Current channels.conf 

ABCFAM:537000000:QAM_256:20:21 
TNT:537000000:QAM_256:25:26 
NBC:543000000:QAM_256:16:17 
WHUT:543000000:QAM_256:18:19 
MPT:657000000:QAM_256:49:52 
WJZ-DT:657000000:QAM_256:33:36 
MPT-KIDS:657000000:QAM_256:81:84 
MPT-PS:657000000:QAM_256:97:100 
MPT-DT:657000000:QAM_256:65:68 
MPT-LEARNER:657000000:QAM_256:113:116 
WBALTV-DT:717000000:QAM_256:49:52 
WMAR-DT:717000000:QAM_256:113:116 
WMAR:717000000:QAM_256:33:32 
NBC11:717000000:QAM_256:65:68 
WB:723000000:QAM_256:16:17 
FOX5:735000000:QAM_256:16:17 
BFF-DT:kexec561000000:QAM_256:20:21 
JWLTV:567000000:QAM_256:49:50

Complete Scan Results

WJZ-DT:657000000:QAM_256:33:36:2 
MPT-DT:657000000:QAM_256:65:68:6 
WBALTV-DT:717000000:QAM_256:49:52:8 
WMAR-DT:717000000:QAM_256:113:116:7 
BFF-DT:561000000:QAM_256:20:21:4 
ABCFAM:537000000:QAM_256:20:21:19 
TNT:537000000:QAM_256:25:26:21 
NBC:543000000:QAM_256:16:17:14 
WHUT:543000000:QAM_256:18:19:15 
MPT:657000000:QAM_256:49:52:1 
MPT-KIDS:657000000:QAM_256:81:84:3 
MPT-PS:657000000:QAM_256:97:100:4 
MPT-LEARNER:657000000:QAM_256:113:116:5 
WMAR:717000000:QAM_256:33:32:15 
NBC11:717000000:QAM_256:65:68:12 
WB:723000000:QAM_256:16:17:3 
FOX5:735000000:QAM_256:16:17:8 
JWLTV:567000000:QAM_256:49:50:12 

[0ae-0002]:645000000:QAM_256:0:37:2 # No 
[0e2-0001]:699000000:QAM_256:0:17:1 # No 
[101-000d]:729000000:QAM_256:0:50:13 # No 
TWC:543000000:QAM_256:0:0:19 # No 
GUIDE:543000000:QAM_256:0:0:2 # No 
CN8:543000000:QAM_256:0:0:21 # No 
SNBC:543000000:QAM_256:0:0:3 # No 
GAC:543000000:QAM_256:0:0:211 # No 
MTV:555000000:QAM_256:0:0:104 # No 
USA:555000000:QAM_256:0:0:112 # No 
CMDY:555000000:QAM_256:0:0:103 # No 
DISC:555000000:QAM_256:0:0:109 # No 
NICK:555000000:QAM_256:0:0:106 # No 
WJLA:555000000:QAM_256:0:0:101 # No 
TOON:555000000:QAM_256:0:0:102 # No 
SCIFI:555000000:QAM_256:0:0:107 # No 
TLC:555000000:QAM_256:0:0:110 # No 
VH1:555000000:QAM_256:0:0:111 # No 
AMC:555000000:QAM_256:0:0:108 # No 
DISN:555000000:QAM_256:0:0:105 # No 
iNDB:633000000:QAM_256:0:42:3 # No

Good Links

http://www.pchdtv.com/forum/viewtopic.php?t=693 
http://www.xmission.com/~pchdtv/forum/viewtopic.php?t=688 
http://www.gossamer-threads.com/lists/mythtv/users/149939?search_string=atsc%20channels%20manual;#149939