From more than three people (3 people is my minimum before posting a rumor) I've heard that Jimbo Fisher appears to be the frontrunner for the offensive coordinator job as long as no head coaching opportunities come his way. The team to watch in that area is Cincinnati.
Otherwise the new offensive coordinator will probably break up the staff and there will be a new wide receivers coach, which is something that the program has been sorely lacking. It's possible Ron Dugans, who's been the staff's GA for the last couple seasons, will get the full time promotion. But that's not a guarantee.
Otherwise a few names have popped up here and there but Fisher appears to be the one coveted by the FSU brass.