I dont have the complete answer, but I can give you a start, as I am attempting to make it work as we speak..
The newest jquery.history.js file does work in chrome:
http://www.serpere.info/jquery-history-plugin/samples/ajax/
and, not to be putting down on ajaxify, I have used it for years, but I sometimes think it has been a bit of a crutch for me, not really learning the simplicity of ajax myself since 'Max' did such a sweet job with ajaxify itself.
I am currently just utilizing that little ajax demo from the history.js site itself, for my needs, its working just fine..but I am still trying to get ajaxify back..
It really seems simple, ajaxify is using the old history file, and a history.fixed.js file, and the both use the old style of historyInit() instead of the new history.init(), I spent a few minutes, ok hours, trying to get it to work, but could not, I am gonna give it a try again, but have just put in a email to 'Max' from ajaxify per his site:
http://max.jsrhost.com
but it didnt seem to send..
I will keep you posted!
(hats off to stackoverflow!! thank you thank you thank you for being you!!)