easiest way to access web sites that IP block US?

[Self Made]

What's the easiest way to access web sites that IP block the US? I don't need to play poker on overseas sites, just visit some web sites. I need access to non-US poker sites periodically to maintain some information on them. E.g. a Firefox extension which could switch between regular and non-US proxy access at the push of a button would be good, if it exists. I should appear to be coming from a non-US ISP, perhaps an EU country is best.