i live on capitol hill, too, and ride to UW every day. where on the hill will you be living? i'm on 21st and john, so my route is down 24th and over the montlake cut. i pass montlake bike every day, so they've become my LBS. there are a few guys in there who ride fixies, so they know what's going on when i take my bikes in. they sell very little track stuff, but are happy to special order anything, of course. i'm in recycled cycles quite a bit, too, i just don't go there for repairs/service. they have some really nice vintage track bikes hanging up. counterbalance (at the foot of queen anne hill) specializes in fixed gear service/sales, but it's just too far for me.

obviously, you know about the hills downtown. there are some streets in other parts of the city that are too steep for me to go down brakeless, but i can avoid them. as j3rmz said, there aren't a ton of brakeless riders around. coming down from capitol hill to the u district will be a chore without a hand brake, but it's fun.

my rain bike has a front brake. i don't recommend riding brakeless in the winter around here--the streets are constantly wet.

let me know if you want to ride when you get into town. hell, we seattle people should get together to ride anyway.