From what SI's Peter King is hearing, Brett Favre is being slightly tempted about playing football again:
When I say slightly, I mean slightly. I don't think any team is going to come after him now, and I don't think he's going to pursue anything. But I do think if a starter gets hurt or stinks, and the coach has no faith in the backup, Favre is going to get a call. Depending on the team, he might consider returning.