Edit: "a person can use a free, ad-supported Spotify account anywhere outside of their home country for 14 days."
http://www.billboard.biz/bbbiz/content_display/industry/e3ib...
The Spotify client does support proxying, so I'll be using my proxy server permanently after the 14 day limit, I guess. But if you pay them for the Unlimited or Premium plans, you don't have to worry about that.
http://eu.techcrunch.com/2010/06/03/spotify-already-has-3000...