Erik, hope you find a buyer for your names. Personally I think mobile advertising names are somewhat undervalued. Just think about Google's Android Market (Play) and how much they are making money out of their mobile ads. Wouldn't .mobi fit into that market?
During .mobi landrush, I had a chance to register MobiAds.mobi, but decided not to take it.
Here are some of the .mobis I've sold:
Motorsports.mobi
GroceryStore.mobi
CameraShop.mobi
NSA.mobi
WebStore.mobi
VoiceOverIP.mobi
ComputerStore.mobi
SportsTicket.mobi
LowestRates.mobi
I still have one 3-character .mobi for sale, that is UHD.mobi