Just got word from Matt Burris @ 3DGpu.com that he's posted his GeForce FX 5600/5200 Ultra preview. Update: Just got word from Dave Baumann @ Beyond3D that their GeForce FX 5200 & 5600 preview is up as well.

The 5600 Ultra is the successor to the Ti4400 and Ti4200, whilst the 5200 Ultra and non-Ultra are the MX's. As you can see, NVIDIA are no longer using the MX name for their mainstream/value cards. The beauty of the 5600 and 5200 cards are that they both support all DirectX 9 features, nothing has been cut out, so you can soon get a DirectX 9 video card for less than $100. For the full article @ 3DGpu click on the GeForce FX pic.

Beyond3d Preview: GeForce FX 5600/5200 Ultra What with GDC going on and CeBit just around the corner both ATI and NVIDIA want to shout about their new graphics parts. We we've seen in our ATI Radeon 9800 PRO review ATI have already announced their spring refresh products, including their second generation of DX9 parts. Today NVIDIA puts the flesh on the GeForce FX range by announcing the GeForce FX 5200 and 5600 products, based on the NV34 and NV31 chips respectively.

And you might want to check out Nvidia as well as they have updated their frontpage with details of their GeForce FX family of GPUs 5800, 5600, 5200.