Tom Tomorrow is not endorsing Dean, but he is apparently encouraged by what he sees in the Dean campaign:

I've been saying for years that the Democrats need to grow a backbone--when it starts to happen, I think it's something that deserves encouragement.

This is significant because Tom has been a major league critic of the Democratic party from the left (I believe he supported Nader in 2000 but I could be wrong on that point). I read in this that Tom would find a Dean candidacy acceptable and thus would not try to undermine it like some did with the Gore campaign in 2000.