I should point out that Daily Kos does not fully believe in full disclosure. Or at least Daily Kos doesn’t practice it. He’s honest about this point, but he writes in “disclosure post”:

But for the record, I will not discuss my role within the Dean campaign, other than to say it’s technical, not message or strategy. I will also not discuss any of my other clients, including their identities (I have non-disclose agreements to which I must adhere).
Some of you may be upset, but there’s nothing I can do about it. I have to make my living, and if I can do so helping Democrats win elections, I can’t imagine anything more exciting and fulfilling. [Italics mine]

So yes he disclosed about Dean but not about some unknowable number of other Democrats. I’m not a big Kos reader, but the statement that “helping Democrats win elections” is the most exciting and fulfilling thing he can imagine seems to underscore Kos’ status as a partisan Democrat Bulletin Board. Again, he’s honest about all this, but his position is he’s free to take money from Democrats (presumably many of them elected Democrats) without telling us who they are and that his highest priority is electing Democrats. We also now know that it is accepted practice among at least some prominent Democratic strategists to throw “technical” contracts in the hope of extracting favorable coverage. This is not exactly a recipe for shining intellectual independence now is it?