From today's NYT...

<blockquote>At a private dinner that Mr. Edwards, a former senator, held at his
home last Saturday for a dozen close friends, he said he had spoken
recently with Mr. Gore about the benefits of neutrality, someone who
was at the dinner said. Although a number of his supporters had been
urging him to endorse Mr. Obama and Mrs. Clinton has actively sought
his backing, Mr. Edwards said he intended to remain on the fence for
the time being, the person said.</blockquote>

There's no point for him to do any endorsing until the week before March 4th anyway.