From Byron York's 527 donation update at The Corner:
The top 2007 giver to 527s is — drum roll, please — George Soros, with $3.5 million in contributions to Democrat-affiliated groups. The rest of the top ten are Rachel Mellon, with $3.48 million to Democratic-affiliated groups, Sheldon Adelson, with $2 million to Republican-affiliated groups, Fred Godley, with $1.1 million to Republican-affiliated groups, Donald Sussman, with $1 million to Democratic-affiliated groups, Stephen Bing, with $883,000 to Democratic-affiliated groups, Robert Bingham, with $812,000 to Democratic-affiliated groups, Lee Fikes, with $600,000 to Democratic-affiliated groups, John R. Hunting, with $593,000 to Democratic-affiliated groups, and Francine Goldstein, with $500,000 to Democratic-affiliated groups. (It should be noted that the two Republicans in the top ten, Adelson and Godley, gave most of their money to Gingrich.) And you should remember that these are 2007 figures — off-year figures — and the contributions will likely go way up in 2008.
Well, so much for McCain-Feingold. The Lefties took advantage of that loophole before the Repubs, didn't they?