I have tried to implement Admob ads in one of my game, and it seems to work fine.. i think..? 50% + of the time though when in the game I get an add banner for "test 1 mydomain.com" and then it flips to "test 2 test 3". I don't know if that is a real ad or if this is some.. test? I almost get the impression the ad is not found and instead it gives an ad link to a register domain site?
I tried to take a screenshot of my android with my ipod phone, the quality is very very bad though: