Is anyone here (shop dudes esp) especially talented when it comes to removing seized seatposts?

I got a new seatpost tonight and when I went to remove my old one and it's most definitely stuck in there. It's one of these jobbies (below) and the downside is that the bolt cluster at the top is not the same piece as the post itself and when I yank on the seat trying to pull it out - the bolt cluster is coming out of the tube and the tube is staying securely in place. Any ideas and/or volunteers? I definitely want this ****er out NOW!