No wifi problem, i encountered so far a problem with Bluetooth (maemo-pan) related to dbus and a problem with Canola, also related to dbus. Quite annoying though.

Then there's the volume. In my tests i learned that it is not related to the backends or codecs you use, because it always sounds okay in headphones and garbled in speaker. You can make it somewhat louder using ao=sdl and afm=libmad, but not very high and still garbled (not as much as with dspmp3), okay in earbuds otherwise.

Maybe fanoush can tell us more on that?

Didn't test Skype calling till now.

EDIT: Fixed the Canola problem - the atabake mplayer backend is checking osso_software_version to see what OS it is on, acting accordingly - that effectively leading to atabake receiving EOS (end of stream) and not playing video files. Put this in /etc/osso_software_version:

to get videos running in Canola. Another good thing is that Canola is using omapfb on 770 (maybe xv is too slow) and the videos run okay (not sure if they have tearsync though). So if you have N800 and you want to get Canola running faster and with less CPU - you can try the same (not sure if it will work. Some official support by the Canola guys of the tearsync kernel (maybe tearsync is disabled in slave) will be great though.