In one days time, all three chips discussed here dropped in price. The 2.2 GHz P4 dropped $19 to $609, the 2.0A P4 dropped $10 to $381, and the 2000+ XP dropped $4 to $328.
As always, prices go up and down on a daily basis, just like any other computer part out there such as RAM, motherboards, etc.
Just as a side note, the lowest price on pricewatch for the Athlon XP 1900+ is $226. It performs equal to and sometimes better than the 2.0A NW and still costs $155 less. Maybe people aren't willing to pay a lot for AMD's processors like they are for Intel's processors, but the price difference is still ridiculous IMO, especially considering the fact that there's much better motherboard support compared to just 6-7 months ago. The performance, quality, and stability of Socket A board has progressed over time, so perhaps AMD will raise their prices, frankly because they should be charging more for their processors. Either that or getting more OEM deals will help out AMD financially.