It's ok to say "I don't know".
UK has zero interest in Bobby and I doubt Bobby has any serious interest in them. It's really more of a leverage thing on his part to get a better job. UK boosters hate him because of his time here in Louisville (where he repeatedly called them "Blue Smurfs" and "those Slapdicks from Lexington" along with running scores up on their football team) and they don't want to pay their football coach the amount of money that Bobby would likely demand.
As far as Charlie to Knoxville, from what we've heard he's 3rd or 4th down their list and there's really no guarantee that he would even take the job if offered. He has a top 10 and potential BCS championship game caliber team coming back next season (we lose 12 seniors, only 3 of which play any significant reps) along with a probable Heisman candidate quarterback in Teddy Bridgewater. If we can get a big name team to play us in our 1 open OOC schedule spot next season, and if we go undefeated we could make it to BCS #2. That is worth staying one more year here. There are always job openings. The 'Ol Ball Coach down in Columbia SC has to retire at some point. Charlie may be looking at that job, I don't know.
At this point all we've heard are the same rumors that Shawn Watson is on Auburn's radar. We don't know where he is on their list however.