Re: Seat post stuck
Weld a thick chunk of steel to it and pound it out. Add another pipe to the top if needed to get serious with a sledgehammer and it WILL come out.
Get medieval on it!
You could also cut the slit in the seatpost tube longer to relieve some of the grip if you can get down to where the problem is with out going nuts. I wouldn't extend the slit more than a inch or so.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.