In case the picture is too small, it reads:
Do I have your attention now?
I know all about her, you dirty, sneaky, immoral, unfaithful, poorly-endowed slimeball.
Everything's caught on tape.
Your (soon-to-be-ex) Wife,
p.s. I paid for this billboard from OUR join bank account
Now, I don't know if this is real or not. If so, I'm hoping Oprah calls this woman and puts her on her show, because I think this is awesome. There is no logo or anything to identify it as being an ad - though ads have been sneaky before. I can't possibly imagine what this would be an ad for, though, so I think it's for real.