I think Detroit is a good trade partner for Rondo because you can fashion deals around Drummond (my preference) or Monroe, two blue chippers.
One of the problems I see is that there aren't a lot of other teams that match up well. The one other team I would look at is Charlotte, for three reasons: (1) they are looking to improve in the short term (see, e.g., Jefferson signing); (2) they are aware that they have trouble attracting free agents and that when they do they have to overpay (again, see, e.g., Jefferson signing); and (3) I don't think they are particularly shrewd.
Proposed trade:
CHA receives: Rondo, Wallace (post Dec. 15), Bass, and Lee
BOS receives: Kidd-Gilchrist, Biyombo, Sessions (expiring), Gordon (expiring), 2014 1st round pick from Portland, 2014 1st round draft pick from Detroit, 2016 first round pick.
Charlotte has been looking for a signature player for that franchise, and Rondo would certainly be that. Also, I think they'd be intrigued by a Rondo/Walker/Jefferson/Zeller core.
For Boston, that's a lot of assets and a lot of cap space.