Sound and music work fine.. I like GMPC better than the Maemo stuff anyway.

Video playback works in non-fullscreen with modifications. But it's not perfect yet, obviously.

Bluetooth connectivity works but I haven't gotten tethering to work yet.

Keyboard works fine with my xmodmap files. Though the CHR key still doesn't work because there isn't a "character" app in debian that I'm aware of.

USB works the same as in Maemo that I've noticed. You have to switch it to host mode for Keyboards and stuch.. I've never tried it in "slave" mode.

I need to catch up on this MER thing.