Anyone heard anything about Edwards endorsing tonight?

The Huffington Post is running a story that John Edwards may be endorsing Obama tonight at his rally in Grand Rapids, MI at 7:00p.m.  Can anyone provide more baseless gossip on the subject?  Edwards certainly has been more visible in the last few weeks and he is a smart guy, so he knows that every other question is going to be about his endorsement (see recent grilling spectacle on CNN morning show).