Interesting:

U.S. Sen. Mel Martinez plans a major announcement in Orlando shortly and a highly-placed Republican source says Martinez will announce that he’s not seeking re-election and that he may leave his seat in advance of the end of his term in 2010. That would open the door for Gov. Charlie Crist to appoint a replacement in advance of a wide-open Senate race in ‘10.

Really, less than one term in the Senate? I would like to know the back story here.