NV20 should be hitting retailers in quantities in April at the latest, though pricing still hasn't been firmly set from what I have seen.
Tough choice overall to make between the three boards. Between the GF2 and Radeon I would go Radeon, but the GF2 Pro and Ultra are now quite reasonable in price, the Ultra going for under $350 at some places, and there is a very large performance rift there. If I was buying right now(which I'm not because the NV20 is very close) I'd go Ultra, though I think you will be very happy with any of the three you go with.
On the topic of that poll-
IBMer is NOT, never has been, and from what I know of him never will be a nVidiot in any way shape or form. To insinuate so in the discussion thread over there is quite frankly either zealotry or intentional antaginization(which I've been known to do, particularly with IBMer and Robo).
No surprise at that forum, truly the nastiest I have ever seen(though there are a few good guys who do post over there). I wouldn't trust a thing you heard over there if you are looking at a purchasing choice, just as I would advise you to not listen to people on a nVidia board about the same type of choice.