Via TPM, from Greg Sargent:
Edwards Didn't Endorse Anyone On Leno Tonight, NBC Flack Confirms
By Greg Sargent - March 20, 2008, 9:02PM
John Edwards just finished up taping his appearance on Jay Leno tonight -- it hasn't aired yet. The fact that he was appearing on the show prompted many to wonder whether he would use the appearance to endorse Hillary or Obama.
The answer: Nope. He didn't endorse either, according to Leno's publicist, Tracy St. Pierre, who emails me this:
No news...it was a catching up interview, but he didn't throw his support either way.
So no Edwards endorsement for now.