I've been to the portland comic con before :]
It's actually pretty cool. There is a lot of anime, and a lot of cosplaying.
It's a good excuse to dress up for sure. I think there should be a Kumoricon booth there, but I guess it's not happening. xD
I think it was in may last year, I don't remember too well, but I found out about it in the oregonian because I spotted a picture of Ed and Al from FMA. >_>