Here are some wrap up posts about the Altitude Design Summit that contain a lot of useful information:
Janel from Apartment Therapy has put together the list of speakers (or at least those that have blogs).
Mint has a panel by panel wrap up of of the talks she attended.
Say Yes To Hoboken shares the best bits of advice from the summit.
Petit Elefant has the list of design sites mentioned in the first panel (tons of new ones as well as old favorites), and SF Girl By Bay shares her favorites among those as well as some new favorites of her own.