nVidia is now at the point where they not only have more than one product for each market segment, but they have products with no market space, which, incredibly, is not only a consequense of fact # 1!! Someone at nVidia lost it somewhere along the way...
Just shows how much the ATi 128mb 8500/8500LE shook 'em up at nVidia. They planned to make $299 the price of admission to the real GF4 club, tried to pan the MX thing off on the rest of us, and at close to $200, and quietly run off the rest of the GF3s at acceptable prices. But then they freaked over the hole in their lineup that was about to be filled by ATi, so slapped together an unrealistic 4200 TBD announcement, which then cast a shadow of doubt on the MX460. So they bring out the 4400, 4600 and 440, and let the middle settle out while the GF3s sold out, ATi got their products in the pipeline, and they scrambled to deliver on the 4200.
Then they finally let people know it wasn't really 128mb of 250mhz memory, rather was 128mb OR 250mhz. And meanwhile the MX460 remains well out of sight and one has to question if it ever will show. So what's left of the originally announced lineup are the two high-end, high-priced Ti cards and the two cheaper (but not cheap), memory-limited MX cards. And even though I think the 64mb 4200 card looks great on specs, the board itself looks slapped together, not a GF4 Ti, not a GF4 MX, no BGA memory, something that didn't exist even on the drawing board two months ago. I don't know what the 128mb board looks like, but maybe it has a PCI daughter card with the extra 64mb wired to the main board...
Anyway, it probably shows again that $150-200 is the sweet spot for gamers, and nVidia's attempt at screwin' 'em to the wall with no choice but to pony up the extra for a 4400, live with the MX limitations, or help clear out the supplies of GF3 cards didn't work out as planned.