Oh, I'm jealous, I really like Portland! I love Fabric Depot, you'll be happy you went!
I think almost everyplace cool that I know about in Portland has already been listed, except I don't see Voodoo Donuts on here yet. If you like donuts with crazy stuff like bacon or fruit loops on it, try Voodoo Donuts.
Oh, and Sock Dreams! They have so many cool and cozy socks there - great place to pick up some Christmas gifts.