Hi,
I did a quick test of what audio files look like when used inline, with the new OGG Handler extension:
http://commons.wikimedia.org/w/index.php?title=Commons:Sandbox&oldid=756...
It appears that the 'frame' keyword doesn't cause the new player to appear. I doubt that frame is used very much, but since the old behaviour is next to useless, I suggest that it get the upgrade as well.
Also,
[[image:foo.ogg|caption]] now seems to have no material difference to [[image:foo.ogg]]. (Maybe the caption could appear next to the "i" graphic?)
Another minor thing is that when the "thumb" keyword is used, the "i" graphic is centred, whereas otherwise it is left aligned.
thanks, Brianna