I've put together a simple first-order system to analyze goaltender performance. First, I calculated the probability of scoring from 2x2-foot quadrants using data from 2001 through last week's games:

I then took every shot faced by each goaltender and calculated the number of goals we'd expect an average goaltender to allow is he faced the exact same set of shots. [Note that shot distances are relative to the end boards, not to the goal line.] This is obviously a coarse estimate: we have no information on whether shots were defended or screened, and because of the difference in the way shot types are recorded in different arenas, I haven't differentiated between them. [Yes, in hopes of improving the system, I am happy to accept critical comments!]
At any rate, the table below shows the number of goals allowed by each NHL goaltender this season (minimum: 300 mins) and the expected number of goals allowed by an average goaltender.
So as an example, Henrik Lundqvist has allowed 41 goals on 567 shots at 5-on-5, for a 927 save percentage. However, an average goalie who faced the 567 shots from the same locations would expect to allow 58.3 goals, for an 897 save percentage. On a per-60-minute basis, Lundqvist's Goals-Against-Average is 1.90 - 0.80 goals lower than an average goalie. I'll publish some charts for individual goaltenders so we can compare the best goaltenders to the worst in this metric.

I then took every shot faced by each goaltender and calculated the number of goals we'd expect an average goaltender to allow is he faced the exact same set of shots. [Note that shot distances are relative to the end boards, not to the goal line.] This is obviously a coarse estimate: we have no information on whether shots were defended or screened, and because of the difference in the way shot types are recorded in different arenas, I haven't differentiated between them. [Yes, in hopes of improving the system, I am happy to accept critical comments!]
At any rate, the table below shows the number of goals allowed by each NHL goaltender this season (minimum: 300 mins) and the expected number of goals allowed by an average goaltender.
So as an example, Henrik Lundqvist has allowed 41 goals on 567 shots at 5-on-5, for a 927 save percentage. However, an average goalie who faced the 567 shots from the same locations would expect to allow 58.3 goals, for an 897 save percentage. On a per-60-minute basis, Lundqvist's Goals-Against-Average is 1.90 - 0.80 goals lower than an average goalie. I'll publish some charts for individual goaltenders so we can compare the best goaltenders to the worst in this metric.
PLAYER STATS | EXPECTED STATS | |||||||||
PLAYER | GP | TOI | SOG | GA | SPCT | GAA | EXGA | EXSPCT | EGAA | DELTAGAA |
TIMOTHY JR.THOMAS | 22 | 977:05 | 521 | 23 | 955 | 1.41 | 44.6 | 914 | 2.74 | -1.32 |
HENRIKLUNDQVIST | 31 | 1289:26 | 567 | 41 | 927 | 1.90 | 58.3 | 897 | 2.71 | -0.80 |
CRISTOBALHUET | 18 | 773:04 | 411 | 25 | 939 | 1.94 | 34.9 | 915 | 2.70 | -0.76 |
ILJABRYZGALOV | 25 | 924:13 | 442 | 25 | 943 | 1.62 | 36.4 | 917 | 2.36 | -0.74 |
CHRISOSGOOD | 19 | 797:26 | 337 | 22 | 934 | 1.65 | 31.7 | 905 | 2.39 | -0.73 |
ROBERTOLUONGO | 29 | 1160:50 | 536 | 30 | 944 | 1.55 | 42.7 | 920 | 2.20 | -0.65 |
MARTINGERBER | 24 | 964:07 | 542 | 38 | 929 | 2.36 | 48.1 | 911 | 2.99 | -0.62 |
JASONLABARBERA | 22 | 889:57 | 477 | 37 | 922 | 2.49 | 44.3 | 906 | 2.99 | -0.49 |
EMMANUELLEGACE | 23 | 934:54 | 394 | 28 | 928 | 1.79 | 35.6 | 909 | 2.28 | -0.48 |
CAREYPRICE | 17 | 728:33 | 386 | 29 | 924 | 2.38 | 34.4 | 910 | 2.83 | -0.44 |
MARTINBIRON | 28 | 1088:09 | 615 | 41 | 933 | 2.26 | 48.8 | 920 | 2.69 | -0.43 |
JEAN-SEBASTIENGIGUERE | 27 | 1013:22 | 433 | 31 | 928 | 1.83 | 37.7 | 912 | 2.23 | -0.39 |
CAMWARD | 27 | 1086:42 | 530 | 41 | 922 | 2.26 | 47.8 | 909 | 2.64 | -0.37 |
RYANMILLER | 31 | 1254:29 | 602 | 45 | 925 | 2.15 | 51.9 | 913 | 2.48 | -0.33 |
RICKDIPIETRO | 32 | 1283:57 | 601 | 46 | 923 | 2.14 | 52.4 | 912 | 2.44 | -0.29 |
DANELLIS | 14 | 502:01 | 230 | 16 | 930 | 1.91 | 18.2 | 920 | 2.18 | -0.27 |
TOMASVOKOUN | 32 | 1346:02 | 726 | 54 | 925 | 2.40 | 59.7 | 917 | 2.66 | -0.25 |
VESATOSKALA | 29 | 1168:59 | 554 | 47 | 915 | 2.41 | 52.0 | 906 | 2.66 | -0.25 |
PASCALLECLAIRE | 23 | 856:31 | 374 | 24 | 935 | 1.68 | 27.0 | 927 | 1.89 | -0.21 |
NIKLASBACKSTROM | 22 | 894:17 | 394 | 28 | 928 | 1.87 | 30.8 | 921 | 2.07 | -0.19 |
MIKAELTELLQVIST | 10 | 393:12 | 199 | 15 | 924 | 2.28 | 16.1 | 918 | 2.46 | -0.17 |
ALEXAULD | 15 | 620:41 | 296 | 22 | 925 | 2.12 | 23.7 | 919 | 2.29 | -0.17 |
EVGENINABOKOV | 35 | 1446:58 | 607 | 46 | 924 | 1.90 | 49.6 | 918 | 2.05 | -0.14 |
FREDRIKNORRENA | 15 | 527:50 | 237 | 20 | 915 | 2.27 | 21.0 | 911 | 2.39 | -0.12 |
MIIKKAKIPRUSOFF | 35 | 1438:23 | 660 | 54 | 918 | 2.25 | 56.8 | 913 | 2.37 | -0.11 |
MARTINBRODEUR | 30 | 1286:11 | 531 | 44 | 917 | 2.05 | 46.4 | 912 | 2.16 | -0.11 |
NIKOLAIKHABIBULIN | 25 | 970:42 | 421 | 39 | 907 | 2.41 | 40.4 | 903 | 2.49 | -0.08 |
PATRICKLALIME | 10 | 390:04 | 167 | 15 | 910 | 2.30 | 15.4 | 907 | 2.37 | -0.07 |
MARC-ANDREFLEURY | 21 | 760:41 | 388 | 32 | 917 | 2.52 | 32.4 | 916 | 2.55 | -0.03 |
KARILEHTONEN | 13 | 472:40 | 250 | 22 | 912 | 2.79 | 22.2 | 911 | 2.82 | -0.03 |
JOHNGRAHAME | 11 | 435:36 | 238 | 22 | 907 | 3.03 | 22.2 | 906 | 3.06 | -0.03 |
PETERBUDAJ | 22 | 906:00 | 419 | 35 | 916 | 2.31 | 35.0 | 916 | 2.32 | -0.00 |
MARTYTURCO | 25 | 1082:27 | 473 | 40 | 915 | 2.21 | 39.3 | 916 | 2.17 | 0.037 |
JOSHHARDING | 15 | 579:25 | 313 | 25 | 920 | 2.58 | 23.6 | 924 | 2.45 | 0.138 |
DOMINIKHASEK | 18 | 656:53 | 207 | 19 | 908 | 1.73 | 17.2 | 916 | 1.57 | 0.160 |
MATHIEUGARON | 18 | 686:55 | 327 | 31 | 905 | 2.70 | 28.7 | 911 | 2.51 | 0.193 |
RAYEMERY | 12 | 432:39 | 176 | 16 | 909 | 2.21 | 14.4 | 918 | 2.00 | 0.217 |
CURTISSANFORD | 8 | 316:27 | 151 | 13 | 913 | 2.46 | 11.7 | 922 | 2.22 | 0.235 |
OLAFKOLZIG | 28 | 1175:33 | 510 | 52 | 898 | 2.65 | 47.2 | 907 | 2.41 | 0.242 |
DANYSABOURIN | 18 | 650:38 | 316 | 31 | 901 | 2.85 | 28.3 | 910 | 2.61 | 0.248 |
DWAYNEROLOSON | 22 | 852:05 | 463 | 42 | 909 | 2.95 | 38.4 | 916 | 2.70 | 0.250 |
CHRISMASON | 24 | 877:12 | 434 | 45 | 896 | 3.07 | 39.8 | 908 | 2.72 | 0.350 |
BRENTJOHNSON | 9 | 344:40 | 165 | 17 | 896 | 2.95 | 14.7 | 910 | 2.57 | 0.386 |
MIKESMITH | 12 | 465:48 | 206 | 22 | 893 | 2.83 | 18.9 | 907 | 2.44 | 0.387 |
HANNUTOIVONEN | 10 | 394:32 | 195 | 22 | 887 | 3.34 | 19.1 | 901 | 2.90 | 0.436 |
JOHANHEDBERG | 20 | 795:09 | 419 | 42 | 899 | 3.16 | 35.3 | 915 | 2.66 | 0.499 |
JOSETHEODORE | 15 | 618:30 | 280 | 34 | 878 | 3.29 | 26.4 | 905 | 2.56 | 0.736 |
JOHANHOLMQVIST | 30 | 1190:12 | 508 | 58 | 885 | 2.92 | 43.2 | 914 | 2.18 | 0.741 |
J-SEBASTIENAUBIN | 13 | 427:15 | 214 | 24 | 887 | 3.37 | 17.9 | 916 | 2.52 | 0.848 |
ANDREWRAYCROFT | 10 | 344:49 | 166 | 19 | 885 | 3.30 | 13.5 | 918 | 2.36 | 0.941 |