Indiana -- The good news and bad news is that Addazio already coached there. They are familiar with him and might want him. The flipside is he knows how hard it is to win there. They also have Big Ten TV money. Ultimately I don't see him leaving for Bloomington, but he might leverage interest for a raise.
Virginia -- We've lost coaches to ACC programs before, but how did that work out for NC State? Virginia might be a better gig on paper (more local talent, potentially more local support), but I don't know if they would make a run at Addazio.
Illinois -- This is a better job than Indiana, but it still has limited upside. The division is winnable but you still have to face Michigan and Ohio State to win the Championship. Of the positions likely to open, this one seems the most plausible.
Ultimately I don't think Addazio wants to leave for just any old job. I think it would take a lot of money and an opportunity to win. Those above don't seem like sure bets, but there are always a few twists in the process. But having a desirable coach is a nice problem to have. We can only hope that Addazio wins so much each year that he is always mentioned for new openings.