Can't believe no one has mentioned Seattle. Such a liberal city, Surrounded by many high tech industries.
its in the US
The US is actually one of the friendlier countries towards bitcoin.
From what I've heard, Canada is nicer right? Toronto is a very large city that could potentially be good as a center, but again, bitcoin is DEcentralized, not centralized, meaning there can't be a definitive "center" for bitcoin. US has the income laws right? Bitcoins are taxed now aren't they?