Speaking as a Celtics fan in Bucks territory, Milwaukee would ABSOLUTELY trade Jennings and someone for Rondo. But those someones wouldn't be Bogut and Delfino, who are emotional cornerstones of the Bucks franchise, strange as that may seem. More so Bogut than Delfino, mind you, but Delfino is WAY too overrated by Bucks fans than he deserves.
Nevertheless, talent-wise we'd honestly have to offer Allen along with Rondo to get Milwaukee to blink on moving Bogut as part of the package (and that's only because the fans here loved Ray when he played in Milwaukee). That's how much people love Bogut in Milwaukee.