Mech Bunny is the way to go, as they are very good on mobile. You cant be successful in this business, without a fully fledged mobile version of your site, and ads from places like
Bitter Strawberry, and
Sex Goes Mobile. Mobile popunders from
Plugrush are essential part of the equasion too.
Other ad networks to consider, for all the mobile versions of your sites, are
First Mobile Cash, and
VPS Mobile , which may turn out even better (in some cases), than the three above.