So I guess according to this one guy who works at DigiPen, there was a playable Brawl demo at the Cafe Mario at the Nintendo HQ. He played it (with a sideways wii-mote, so keep this in mind) and according to him, wavedashing is out although you can still waveland (which I know not many of you care about, but it makes me sad in the pants), l-cancelling is in (which gives me a boner), but airdodges can no longer be controlled (which destroys my boner again). The way airdodging works now is that your character will just move in the same direction he was jumping when he airdodges, which follows the laws of physics in a way, but heavily fucks up aerial combat.
So yeah, Sakurai said he wanted to improve aerial combat. This seems like a major step back. I really hope there's some sort of metagame to Brawl or I will shit myself out of depression.
EDIT: Again, don't know how reliable this guy is, but just figured I'd share.