nVidia has already stated that the GF2MX will be their value part for the forseeable future. By the sounds of it, it could be '02 before we see a NV2X based part taking up the value segment.
With their entering the mobo chipset market, they seem to be focusing their low end efforts in that area at this time, moving the MX to an embedded option where it can very easily be the dominant player and give mobo manufacturers a clear cut choice if they are looking for performance between VIA's S3 based options and Intel's i810.
I would expect a more value oriented NV2X board to make an appearnace in Q2 '01, but probably in the ~$200 range instead of the ~$100 space that the GF2MX currently holds. We may see a clock boost to the MX line of boards, including faster memory to distance itself even further from its' cometitors, but unless ATi moves the Radeon to embedded applications in a timely manner nVidia doesn't have much motivation to come up with a higher performance low end solution.