Right there with you. I've started using the alternate traffic destination and primary only feature hoping this would kill the penny clicks. Good news is it sort of has, but my alternate traffic destinations aren't doing much better - domain sponsor, namedrive, direct to CPA offers.
What is really bothering me is the $.03/click average on the yahoo feed. This must be related to them dropping the minimum bids to $.05 cents. Oh well, it was fun while it lasted. Off to keep testing better ways to monetize my traffic.