Why are these competitions always restricted to the US? I'm in the UK; Amazon sells European-based S3 storage and they have offices in the UK. What's the problem?

I'm working on a cracking idea that I'm sure would arouse their interest. It's so disheartening when I see these kinds of competitions and then realise I'm disqualified for being a dirty European.

Perhaps there's somebody who could demonstrate trustworthiness on here who would allow non-US residents to enter this competition (and others) by proxy through them?

pg - Would you be interested in doing this?