Woohooo!!! Gmail has finally got IMAP support:
I read about this earlier today and couldn't wait to give it a go. This is one of the big features I've been waiting for.
Well, so far so good. Your "Labels" appear a folders and it seems to function as you would expect a normal IMAP server to.
I'll have to give it a while to see how good it is, but so far so good.