Well now, they're trying to tie Edwards behavior with John McCain. The latest meme occurs here:

I think Edward's affair will cost John McCain points in the polls

Why McCain should be terrified that Edwards' affair is in the spotlight...

Carol McCain...the wife John McCain callously left behind.

John McCain's adultery WAS different from John Edwards. . . . . McCain DID NOT REPENT!

There are more, but you get the idea. The first thread is by Frenchiecat whom I believe is some kind of party volunteer.