I got mythbuntu 7.10 with Avermedia A180.
For whatever reason the scan tool from dvb-utils is not picking up anything for me, so I can't try the scan -> channels.conf -> import to MythTV route
MythTV channel scan seems to be working OK.
Problems:
1) the transport list it's relying on doesn't seem to be complete as it misses a number of DT and HD channels (for Comcast here, it's QAM256 High HRC).
2) the channels it does find have weird channel numbers, not even close to the channel numbers on comcast or schedulesdirect channel lists. So, is that why when I do ''Fetch channels from listings source" after the channels scan - it does not do anything?

below is the channel list that I manually compiled (I did not include music channels and PPV).
Per my first problem above, some channel are found by my TV tuner, but not by the A180 (largest continuous groups missing being MHz 192-197 and HD stuff 232-251).

comcast/SD ch# | chl# as found by A180 & my TV | ch desc | detected by A180
119 75.12 LMN yes
123 80.8 Oxygen yes
138 80.6 AMC yes
149 119.6 MoviePlex yes
178 119.2 CNBC World yes
192 126.2 MHz2 Russian World no
193 126.3 MHz3 France24 no
194 126.4 MHz4 Nigerian TV Authority no
195 126.5 MHz5 Russia Today no
196 126.6 MHz6 NHK World TV no
197 126.1 WNVC MHz Worldview no
198 119.3 WQAW-69 (Azteca America) no
200 26.2 WETA Create yes
201 26.3 WETA Family yes
202 26.4 WETA World yes
203 ? WUSA 9 Live Radar yes
204 ? Doug Hill's Weather Now yes
205 ? WJLA Local Point no
208 117.7 NBC Weather Plus yes
210 7.5 WJLA-HD (ABC) yes
211 4.1 WRC-HD (NBC) yes
212 9.1 WUSA-HD (CBS) yes
213 5.2 WTTG-HD (FOX) yes
214 3.1 WDCW-HD (CW) no
215 20.2 WDCA-DTHD (My) yes
220 26.1 WETA-HD (PBS) yes
223 ? A&E HD yes
225 ? HD Theater yes
229 75.1202 HGTV HD ?
231 76.1302 Food Network HD yes
232 ? TBS HD ?
234 129.4001 CNN HD no
235 132.3901 USA HD no
236 132.3902 Sci-Fi Channel HD no
237 129.4002 History HD no
239 103.4102 Discovery HD no
240 130.410 TLC HD no
241 131.4201 Animal Planet HD no
251 121.6 CSNDCHD no
254 125.5 GolfVS ? yes
? 75.12 LMN no

Would appreciate any help!
If someone out there uses this lineup , could you share the transport information or channels.conf? So I could import or manually add the missing channels?

Thanks!