The year's allotment of the current models were pretty much all bought up before the model year was up and they're now discontinued. The new models are rumored to debut in late March to mid April depending on who you listen to. Check with Clevelandplasma dot com - he sometimes comes up with new units.
But if i were to buy a new plasma today, it would be something like the Pioneer PHD-4360 or 5060, or maybe the new NEC commercial model. They have more adjustability and much better stretch modes for 4:3 stuff.