I am now "officially" testing the upcoming ITheora 2.0!
ITheora is a non-flash web audio/video player for the free OGG (vorbis/theora) file format. Actually, it is a php script that manages the playing of the file via a suitable plugin, if it's installed, or by executing the Cortado java player, if no ogg support was detected. It provides a nice GUI, similar to the common flash players.
I'm also designing (or porting) some skins for the player (you can find a Tango one in my deviations) and helping improving the GUI and the translations.
A side effect of this is... well, that I'm neglecting many smaller projects...