I know we've talked about the possibility of a playable Brawl demo in October, but Nintendo has just come out with some actual info about it:
http://gonintendo.com/?p=26847#more-26847On October 18th (the start of E for All), Brawl will be playable. They're also showing an assload of other games. The updates during E for All are going to be pretty crazy. I imagine a bunch of double and triple updates.
Oh, and if you live in California, I hate you.