Identity theft?

I think I figured some of what's going on... I think I've been the victim of some kind of identity theft.

There's an organisation called ACORN who are apparently some kind of union-related group in America who have copied my identity in order to set up a fake blog about Glenn Beck.

I read about it all on a site called Free Republic - I wanted to ask more questions but I couldnt figure out how to register. Please if anybody can help me find out who has stolen my identity can you get in contact.

Leave me a message on this forum if you can help.