Kevin at Blogs for Bush has a nice (and freshly updated) graphic that draws the connections between the Kerry campaign and several 527 organizations — MoveOn.org, for instance.
He also points out that the DNC is boasting about their ties to those shadowy organizations.
For the record, I've nabbed a screenshot (click here) of the web page in question. Mysteriously disappearing web pages are not an unknown phenomenon in Democrat-land.
The only question that remains is whether the DNC owns the 527s, or vice-versa.
Imperial Department of Hegemony By Force
The DNC owns the 527's, not the other way around. After all, the public-employee unions and the plaintiffs' bar already own the DNC.