Oops, here is the answer: http://vimdoc.sourceforge.net/cgi-bin/vimfaq2html3.pl#5.6 Rest of this is good for saving window info: IRC is actually pretty great. From #vim:
22:09 < hendry> How do I configure VIM to resume editing where I was last editing in a file, saved and quit? 22:10 < LeChef> :mksession iirc
For the docs with further information.