From the tipbox:

I thought you’d want take a look at today’s ABC Blotter story by Justin Rood on a new series of mysterious YouTube ads going after the big GOP candidates:
http://blogs.abcnews.com/theblotter/2007/07/dirty-tricks-do.html

They missed Vitter in the madam scandal (or were they edited by skittish ABC?), but he hasn’t had much luck finding the posters of the vids either.

I also just saw that there’s now a fourth ad online that goes after Gore:
http://www.youtube.com/watch?v=sGUOUgNa8B0&mode=user&search=

Will the YouTuber in question please stand up so Big Head DC can get this scoop?