I don't think Lautenburg will run again in 2008, but it's a small possibility.
Hopefully, Richard Codey and Rob Andrews will be the next two senators from NJ.
Lautenberg is already fundraising.
Codey and Andrews might just get to be the next Senators from NJ but here's the most likely scenario in which that happens - Corzine wins this November, appoints Codey as a place holder who doesn't run in '06, Andrews runs for the seat, wins a tough primary and wins the general but it'll be very tough against Kean.
If Lautenberg decides against a run in 2008 (for whatever reason) Andrews will likely run for the open seat and would be a favorite. I don't see Codey running for any higher office.