I would be very very surprised if he signs another contract at LFC. It seems clear to me that the club haven't offered him the sort of money he is hoping to get and he'll have a few decent offers on the table come the summer. Was recently linked with a move to City and Madrid and it wouldn't actually surprise me to see him at City although Juve still seems the most likely.
I've got mixed feelings. I've always felt he is one of the mot over-rated (by our fans) players at the club and like Scotia said, his great games are too few and far between. Having said that he is currently in the middle of an excellent run of form, he is working his socks off and Influencing games so I'd be happy to see him sign another contract if it can be done. Also worth pointing out that the rest of our CMs have all stepped up their fame of late.
It was also pointed out that Can has an excellent injury record which is important for a CM.
If he goes I'd love to see a player like Hamsic from Napoli come in along with Keita in the summer.