I must say this is purely speculation on my part, but as soon as I heard Carson Palmer wanted a trade, this scenario definitely came up in my mind.
The Titans have a QB they're definitely needing to get rid of, Vince Young. The Bungles have a QB that wants out. From a long way off this would look like an ideal situation for both teams. Each QB is unhappy where they are; each QB seems like a better fit with the other team. Of course I don't actually like either of these teams getting a better fit at QB (it would constitute three of our games next season), but you know, if these franchises are smart they'd find a way to make this happen.
Wait, this is the Bungles and Titans we're talking about! Of course they won't be able to pull it off! Everything that is gold in Cincinnati turns into a turd, and Tennessee's Bud Adams is one of the worst owners in the history of the NFL. But if I was the most overrated coach in the league (Jeff Fisher), I'd be doing whatever I could to make this deal to avoid having to plan my offense around a QB with dentures and a walker (Kerry Collins).
There, I just threw a few bombs. My job is done here.