Join Date: Jun 2005
Bikes: 06 Lemond Reno, 98 GT Timberline mtn.bike
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Don't know if you have already tried this (didn't see your other post), but might be worth a try.
Take the seat off, put a wood block over the head of the seat post, and strike the block with a hammer.
If it drives the post further into the seat tube, who cares, at that point you will have busted it loose, and can now remove.