Feds checking out Rezko's story

The Chicago Sun-Times reports:

There's evidence that at least one of the things Tony Rezko is talking to the feds about is Gov. Blagojevich and allegations related to his campaign fund. They've been calling up witnesses and asking them to talk -- or expand upon -- information Rezko has provided them, defense lawyers tell the Sun-Times. The calls have come in the weeks since Rezko first started meeting with federal authorities. Federal investigators have been probing Blagojevich's administration for some time. That includes investigating whether Blagojevich traded state posts or contracts in exchange for donations.
We first saw signs in August that Rezko covertly visited the federal courthouse from his recent residence at the Metropolitan Correctional Center.