Josephine! - Restoring a Joe Waugh ladies tourer

OK, things are getting serious with the whole stuck seat post thing now... this afternoon, me and the neighbours had a proper brutal attempt at getting it out, all to no avail - now the seat post is mangled way beyond use-ability, and still stuck in there.

Tried so far:

1. Soaking it in caustic soda / wd40 / vinegar / etc, for a couple of days.
   
2. Two pipe wrenches at the same time twisting it.
   
3. Upside down in a vice and twisting the frame.
   
4. Heating and cooling the post with a blow torch and a bucket of water.
   
5. Tapping it down with a hammer.
   
6. Tapping it with a chisel (upwards, with the frame upside down in the vice).
   
7. Twisting it around again....
   
8. ....until the head snapped off from the post.
   
   

What are the other options?
Don't be shy with the suggestions; now is the time to get extremely brutal, or get another frame.