the hd streaming quality? it's around 720p i would guess on the HD content. Netflix HD shows look as good as cable HD. it's quantified by MB per second I think so I can't see if it's like 720 or 1080 or whatever. it looks good though. much better since i hard wired it too. you get a lesser quality picture if your using wireless. it also depends on your connection.
as far as the music goes, i was talking about streaming the stuff that's already on your pc hard drive to the tv. like you can play all your music, pics and videos that are saved on your computer through your tv and stereo using the ps3. you just select the media server icon in the music, video or pics section on the xmb and it pops up all the stuff on your computer. you have to set it up though. you gotta turn on media server capability in the ps3 settings and also tell you computer which folders to allow to be accessed by the media server. you can use windows media player media server if you just wanna play your music/videos/pics on the tv. i got PlayOn (cheap yearly subscription) so i could access more stuff from the web. PlayOn has a whole community of people that add internet content through plug ins when needed. i mainly use it for hulu but there's a ton more than that.
http://www.playon.tv/index.phphttp://www.playonplugins.com/index.php?PHPSESSID=93dc8oav55cqsl2n2b01hu5td0&