Hmmm. Sounds like an opportunity for a remake of the Marx Brothers' Duck Soup ;-)

I'm all for that!

Love this idea. This may be the best one yet.

From a character angle, I could see a mysterious stranger who claims to be from a micronation...

From a plot angle, I could see a micronation protesting some toxic corporate policy & demanding a seat at the United Nations (a la The Mouse that Roared)... a once edenic micronation turning into a Lord of the Flies situation when it's overrun by new citizens...

They did a pretty funny version of this idea during Family Guy's initial pre-cancelled phase.

This idea was sort of the basis for a subplot in a Donald Westlake book, which title I don't recall. One of the characters creates her own nation so that she can collect UN development money.

I once lived in a micronation and was the King's paid employee. The Kingdom was Hay-on-Wye and the King was King Richard Booth. For those that have never heard of it Hay-on-Wye is a small town on the Welsh border with England and is famous for its used (or what we in the UK call "secondhand") book stores. Richard was (and remains) a true British eccentric and a one-off. More info here:
http://en.wikipedia.org/wiki/Hay-on-Wye#King_of_Hay-on-Wye

You were joking, perhaps, about the Tea Party people wanting to do this... but it has been a popular notion among libertarians, freethinkers, Objectivists, and so on, for some time now. The main thing they see standing in the way is that they would need nukes to be a sufficient deterrent to invasion by the United States, so that they could be left alone. In a sense, the video game BioShock explored this theme, though with an undersea nation instead of a remote island. In BioShock, of course, it was the people who sought to cheat the system who brought the utopian society down.