It took me awhile to scan, configure, and manually confirm each unecrypted QAM (Comcast) channel in my area (Reading, PA), so here are the results, in case it can save anyone else some time.
Note: about halfway through it, I found a pretty good list here
http://home.comcast.net/~cypherx/freeqam.htm and so I used my own information to update it. It looks like there were channel rearrangements made between August and November.
Another note: I do not care about the digital music channels, on-demand channels, or really anything past the History Channel (81.7, look for the '===' line) so I did not look up XMLTVIDs or verify channel assignments for those. They are included here directly from the above URL.
Code:
Comcast: Reading, PA System
Unencrypted QAM Channel Lineup
Effective 11/03/2007
QAM CH Name XMLTV ID
1.3 WHYYD (PBS-D 12) 24114
6.1 WPVID (ABC-D 6) 19612
6.2 WPVIN (ABC) 43156
6.3 WPVIW (ABC Weather) 43139
10.1 WCAUD (NBC-D 10) 19613
10.2 WCAUW (NBC Weather) 45807
17.1 WPHLD (MYTV-D 17) 32619
26.1 KYWD (CBS-D 3) 19611
29.1 WTXFD (FOX-D 29) 19614
57.1 WPSGD (CW-D 57) 34628
75.0 Weatherscan Local 21586
75.1 WYBE (IND) 12008
75.2 WTVE (Local IND) 11911
75.3 WGAL (NBC 8) 11458
75.4 WITF (PBS 33) 11559
75.5 WPMT (FOX 43) 11782
75.6 Market Connect Network -----
75.8 WBPH (IND) 11314
75.9 WLVT (PBS 39) 11660
75.11 Telemundo -----
76.0 KYW (CBS 3) 10853
76.1 WPVI (ABC 6) 11794
76.2 WCAU (NBC 10) 11326
76.3 WHYY (PBS 12) 11537
76.4 WPHL (MYTV 17) 11778
76.5 WTXF (FOX 29) 11930
76.6 WGTW (IND 48) 12245
76.7 WPSG (CW 57) 11462
76.8 WFMZ (IND 69) 11443
76.9 WUVP (Univision) 11531
76.10 ION -----
76.11 CN8 17064
77.0 COMEDY (Comedy Central) 10149
77.2 AMC 10021
77.7 SCIFI (Sci-Fi) 11097
78.2 HSN 10269
78.3 CSPAN2 (CSPAN-2) 10162
78.4 QVC 11069
78.5 CSPAN 10161
78.10 GOLF (Golf) 14899
79.2 TCM 12852
79.3 FNC (Fox News) 16374
79.7 TBS 11867
80.1 VS -----
80.4 Hamburg Municipal BB -----
81.1 CMTV 10138
81.2 EDUC: Annenberg/RACC Channel -----
81.4 GA: Reading Municipal Access -----
81.5 BCTV -----
81.6 Local -----
81.7 HISTORY (History) 14771
===============================================================================
83.1 ~ 86.12 Video On Demand Sessions
90.21 MC: 70s
90.22 MC: 80s
90.23 MC: Alternative
90.24 MC: Big Band & Swing
90.25 MC: Bluegrass
90.26 MC: Blues
90.27 MC: Classic Country
90.28 MC: Classic R&B
91.21 MC: Classic Rock
91.22 MC: Classical Masterpieces
91.23 MC: Contemporary Christian
91.24 MC: Dance
91.25 MC: Easy Listening
91.26 MC: Radio Disney
91.27 MC: Gospel
91.28 MC: Hit List
92.21 MC: Jazz
92.22 MC: Pop Latino
92.23 MC: Light Classical
92.24 MC: Metal
92.25 MC: Mexicana
92.26 MC: Musica Urbana
92.27 MC: Americana
93.21 MC: Arena Rock
93.22 MC: Adult Alternative
93.23 MC: R&B and Hip-Hop
93.24 MC: Rap
93.25 MC: Reggae
93.26 MC: Rock
93.27 MC: Rock En Espanol
93.28 MC: Salsa y Merengue
93.29 MC: Show Tunes
94.21 MC: Retro-active
94.22 MC: Opera
94.23 MC: Party Favorites
100.21 MC: Singers & Standards
100.22 MC: Smooth Jazz
100.23 MC: Smooth R&B
100.24 MC: Soft Rock
100.25 MC: Solid Gold Oldies
100.26 MC: Sounds of the Seasons
100.27 MC: Soundscapes
100.28 MC: Today's Country
100.29 MC: R&B Hits
100.30 MC: Showcase
100.31 MC: Electronica
101.1 VS/GOLF HD
104.7 In Demand Preview
104.9 NBATV
104.21 MC: 90s
105.8 MoviePlex
105.11 On Demand Barker
106.2 PCN: Pennsylvania Cable Network
106.8 WAPA America - Spanish