Shouldn't we get a discount since a) We helped create the UN and b) They do make their headquarters here?
On a serious note, I think the UN should have gotten that money ages ago. IIRC, the bone of contention on the US end is the discussion of family planning and abortion.
Which brings me to the SOTU address, in terms of the whole "fighting AIDS in Africa" thing. Dubya talked about new drugs that help stave it off. That's great and all, but don't we also want to stop new infections...through, oh I don't know, contraceptives? I didn't hear any talk about that.