Coaches talk to teams all the time. Deion helps fulfil the Rooney rule, too. We've also heard Day, Sark, Freeman rumors. Let's see if he actually leaves.
I'm sure Jerry loves the media attention and the revenue it could create, but he'd be an idiot to bring Deion in. I think Dallas needs to create a culture that he won't build. Same with Witten (lol), no NFL coaching experience. Sucks they missed out on Vrabel, but I could see Jerry going for Aaron Glenn, which could be a great hire.
As for the Raiders, who cares. Mark Davis is an Imbecile.