Yeah Rob, as long as we're blowing budgets why not just cut to the chase and point him at the RED. He could buy a D90, and a 1080P camcorder, come in under the price of the Mark II...with a bonus of dodging a Canon bullet.
Don't buy the D90 for the video function, unless you have some established videography chops. There are some fantastic D90 vid's available online, but they are generally done by people who know WTF they are doing. It's can shoot good video, but it's not P&S.
I've been very happy with my D90 since release day. There are probably some features on the 90 that would make it worth buying over the 80, but it's hard to say without knowing what is important to you.