Imus doesn't do much for me. Giuliani's endorsement in NJ, however, is huge (IMHO). A lot of Jersey folks were intimately touched by 9/11 and Rudy's influence.
Rudy helps, but I don't think he helps that much. Last year, Bret had Rudy's unconditional support, and all it seemed to have done was win over some of the undecided Republicans (maybe the ones that thought Bret was "too conservative").
I think we need some real "hometown boys" to make and endorsement that has a significant effect (who that might be, don't ask me!). Anyhow, I think that endorsements are overrated, but, hey, I suppose they couldn't hurt.
Go Doug Go!