Didn't an author from Penny Arcade successfully get a visa or something like that to enter the US because of an online petition. IIRC he was trying to enter for business purposes but the US Gov't doesn't consider an online comic to be a viable business.
It was Dave from Cynanide & Happiness[0] who wanted to move from Northern Ireland to the US in order to work on their animated cartoons. He filed to get a work visa but the office didn't believe C&H worthy of it.