Thank you for the detailed reply and approach/guidance. Just a bit of followup needed if you (or someone else) does not mind - let me explain.
Under 704, watching TV under MythTV was not possible - it would consistently freeze after about 15 seconds. Although I want all of the other automation features too, we had to at least be able to watch TV.
I checked the forums and this post indicated it was a known problem.http://forum.linuxmce.org/index.php?topic=3170.0
and maybe this one too, though it seemed a bit DVB-S related:http://forum.linuxmce.org/index.php?topic=2273.0
I read elsewhere (cannot find it after looking quickly) this would be fixed in 710. Do you know if that is so?
Anyway, that's why I moved to the 710 beta3, I understand that it is a beta and will have issues, and hoped I might help out by testing.
As far as the remote, I'm not hurting here (yet) - my wireless keyboard and mouse will suffice until everything else is close to working. Then I will try and follow the procedure in:http://forum.linuxmce.org/index.php?topic=3678.0
If all else is working, I'll probably upgrade to the gyro remote anyway - but any remote seems better than the keyboard/mouse in the long run
Thanks again to all who provide such great support and help.