Beware of Mobclix
Just a small heads up for other developers out there that want to monetize their apps with ads.
!! Do not use Mobclix, they will not pay you !!
They do have a nice dashboard and are easy to integrate, but apparently the numbers on that dashboard are made up by number gnomes and do not represent real money. Currently Mobclix owes me over 20k and they are now over 90 days late (so > NET-180).