This is my favorite article against gun control I've ever read. It's a little old (from right after the recent national defeat of new gun control proposals). It's by a liberal democrat, the same liberal democrat who wrote the article on why not to renew the assault weapons ban.
http://kontradictions.wordpress.com/...to-get-better/
He makes some great arguments and presents them in a very convincing way. And being that he comes from a similar political persuasion as many gun control supporters, I think he's much more likely to convince some of them to see things our way.