According to OC WorkBench, NVIDIA is working on a new nForce 650i Ultra chipset based motherboard.
The motherboard will support Intel's LGA775 800/1066 and 1333MHz FSB Conroe processors. However, it won't feature support for SLI. Other features include: Mediashield with RAID 0, 1, JBOD, 5 and NVIDIA first packet for VoIP and priority for gaming traffic technology.
This motherboard should be available later this month or in May for about $99 from XFX, ECS, EVGA and Colorful.