Regarding the fglrx(catalyst) version, yes, I downloaded the latest installer from the website (all 100 odd megs of it). It extracts into an exectuable of sorts which then installs rather cleanly. You do need to manually remove the previous version, though. I'll wikify for the AD02 shortly... just don't want to jinx it ;-)
Then, if possible and/or desirable, I can work with you regarding getting it working otb.
Amazingly, got HDMI audio working (mostly) last night. I say mostly because the volume isn't adjustable from linuxmce but that might just require a few further tweaks.
Didn't have the time to update the post but basically I got it going by putting an .asoundrc (I think) file in the home of the root folder which pointed to the hdmi device. Will update when I get home. On reboot, had audio in MD, then I re-ran AVWIz and did the dolby and dts tests as well which (I think) passed. How does one know? I heard sound on each but it wasn't exactly rachmaninoff.... maybe it's because I'm listening on a crummy 2.1 system coming *out* my TV's stereo jack. Need to borrow somone's high-end amp and see if it sounds better. Still, it's a big step.
Now, when searching I see the following page:http://wiki.xbmc.org/index.php?title=HOW-TO:Install_XBMC_on_Ubuntu_with_AMD_GPU
Which, I have to say, looks as if it has some pretty cool tips and tricks! It also makes me lust after xbmc a bit....
Oh yes, one other thing, UI2 (non-alpha-blending) doesn't fill the screen. Noticed the same thing in the "zoom" step of AVWiz. I was not able to zoom the image or shift it at all. Is that functionality there in AVWiz still... possibly just the graphics card / conf. So UI2 shows with about a 1cm black frame around it. I *think* that some of my DVDs play at full screen, though... will have to confirm.
And another thing- the zbox comes with a little mce remote and usb-IR receiver... pretty cool. It is usable as far as left,right,up,down,"click", enter go but the other buttons don't seem to work. I imagine it basically emulates a usb keyboard and is sending keystrokes. Would be nice to get the other buttons to work so I don't have to hit F3 etc on the keyboard and can just work from the remote. I see there are some ideas in the link above... maybe I can set it up as a "proper" remote in LMCE rather than just having it work as a keyboard.... however... I guess I can otherwise figure a way to map some of those buttons to the appropriate keystrokes or something. More late nights ahead.
It is a sleek and attractive device, I must say.