It appears that NVIDIA is going to launch XT cards just like ATi did some time ago. Unlike ATi these 'XT cards' from NVIDIA are not the performance crowns, but rather a budget solution of the normal ones. GZeasy has spotted the GeForce FX 5600XT in China. So problably we can expect a GeForce FX 5200 XT, 5600XT and 5900XT soon.
Keywords here are that it's based on the FX5600 architecture yet much cheaper but also slower, this might be the new low-end product. The core clock should be very low at 235MHz and it's memory at 400 MHz. There is 128 MB memory onboard and furthermore has the usual gadgets. A really weird release as this is not a product I expected and if correct we can see three new products from the NVIDIA line-up pretty soon.