Well, I found this very interesting, because I thought the new mythtv was more like an "accident", especially considering the trouble it causes with the generation of the initial boot image for the Md in the beta.
Anyways, I'm in the middle of setting up with the alpha-script, hopefully this works better and lets me setup my MD successfully again. By the way, does anybody know if the v4l package has been updated too? The repo I found and described in the wiki (for the nova hd s2) seems pretty interesting and is supposed to get you s2-channels...if there is something similar included already, shouldn't it be enough to just put the firmware in its proper place and reboot?
I thought the new mythtv was an accident as well, it had caused me issues on my ION board which had been using the avenard 'testing' repo when neither my core nor my other md used the avenard repos at all. I asked for the tickets to be closed after confirming that the switch is intentional.
When installing using the beta dvd the avenard 'testing' repo is active and myth is version 0.22. For alpha 2.37 it looks like using a stock LMCE install or using the avenard 'release' repo should work just fine, this would give you myth 0.21. Once the next alpha build is complete it looks like the alphas will need to use the 'testing' repo to stay compatibile with the mythtv protocol changes in svn.