OK, we're kind of loathe to even mention one of tonight's series premieres because it is that infamous sitcom that's based on a series of Geico commercials. We're speaking, of course, of "Cavemen", and it premieres on ABC at 8 p.m. Now, the last time a TV sitcom was based on a series of commercials, the result was "Baby Bob," so we can't blame people and their knee-jerk reactions to this. That trailer up......