I think same topic has been discussed before quite a number of times. It was never mentioned in Google's TOS whether you are allowed to place other form of contextual ads from different company on the same page, but I would avoid doing it anyway. Just to be on the safe side, it's best to put it on a different page. And since you earn well with Adsense, why bother about adbrite????? http://forums.digitalpoint.com/showthread.php?t=983873