Hmm, not a bad idea, a replacement for the FX5200 would be a nice change. If it's only $100 (like the current FX5200), then it would be a very compedative product, and would definatly one-up the current ATI low-end solution (the 9000/9200). If they can be had for $60 like the FX5200 currently is at Newegg, then I see a VERY nice option for those looking to spend very little to get a decent card. Even if it's not quite as fast as the TI4200, the AA algorithm and DX9 "compatability" alone would make it more then worth the money.
Though I must ask, what happened to the FX5300 and FX5400?