I've recently came across a project from Stockholm [1]. They went live before the UK announcement, so I suppose they set up a US entity.

[1] http://www.kickstarter.com/projects/martinkallstrom/memoto-l...

No, their terms state that you have to be a UK resident etc.

If you want all of EU, use another service, like Indiegogo, which has been international since day one.