Aw come on, no SF3 thread? The game's almost out.
E3 Trailer-
As you can see in the trailer, the game will use GGPO and PS3 will have Youtube sharing.
Features of the game summarized at Eventhubs-
http://www.eventhubs.com/news/2011/jun/08/street-fighter-3-online-editions-producer-talks-shop/
One of the challenges requires you to re-enact Daigo's legendary parry followed by the combo he used to finish off the Chun player.
Apparently there WILL be DLC, I expect at least 2I and NG stages and music.
Character-wise? At least 2I Sean (MAYBE 2I Ibuki, but then we'd have 2 Chuns @3@).
ATM Tiers look something like this-
Top: ChunLi, Yun, Ken, Makoto
High: Yang, Dudley, Urien
Mid-High: Oro, Ryu, Gouki
Mid: Ibuki, Hugo
Mid-Low: Alex, Q, Remy, Elena, Necro
Low: Twelve
Swap one or two characters between High and Mid-High, and Mid and Mid-Low and you'd still be right.
TheShend's channel has a HUGE collection of 3S matches-
http://www.youtube.com/user/TheShend?blend=1&ob=5
Finally, how to use 3S Ryu like a BAWS