Android DevCon IV starts on Tuesday, Dec 4, and runs for the rest of the week. You can still register for the conference. Enter in the discount code MEETUP to get a $200 discount.
If you can't swing the entire conference, you might want to get an Exhibits pass. You can get the pass for free if you enter in the discount code FREEEXPO
Hope to see you at Android DevCon IV!
Host of the Informal Android Developer Meetup