I've been testing out the beta of version 5; there's a test page here if y'all are interested:
http://www.trljc.com/tony/movies
It's moving along. Glad y'all got the play icon centred.
You're going to have some pretty serious documentation issues soon. You have:
2 versions of Flash (CS3, CS4)
3 versions of the player itself (3,4,5)
2 versions of swfobject (1.5, 2.x)
2 kinds of skins
and various ways of compiling the player and the plugins and the skins.
But, it's goot stuff. Thanks.
T.

Yup, plugins, playlists, and skins work with v5.0.581, but not Youtube.
http://willswonders.myip.org:8074/Simple_TitlePlugin_v5.html
getPlaylist() and getConfig() don't seem to work yet, but getPluginConfig(name) does work.