I've opted out of Buzz in my Gmail, but use it on the mobile. I just haven't had time to make filters for Gmail, and don't want to have to clean it up later. Once I have time to either clear out that account of mail, or build correct filters, I will Buzz in the Gmail. The filtering there is simply too powerful to not use in the long run. I'm certainly hoping that they apply the Gmail filtering to Wave, and let me Buzz in Wave. - guruvan (Rob Nelson)