I don't see any newer answers to this. You use your last good copy or get back with Adobe to see how much it will cost for them to work over your file.
Again, not much has changed to this old question. As to the temp file, same answer but no one seems to note there is such a file unless we saved it along the way.
I know what the answer will probably be to this. But as I was saving something in photoshop, I went to save something in illustrator that I had traced from an image I had just dragged from the net and it crashed on me and ive just lost two hours of work. I know theres obviously a lesson to be learnt here and save regualarly but.... I'm sure its happened to all of us. But anyway... is there by any chance a temporary saved file illustrator mite have made or something? I know when indesign crashed on me before it recovered my work.