VR-Zone just informed me they managed to score a GT218 card drawing which should give us an idea how the actual card might look like. Nvidia is working on the entry level GT218 cards currently and we will probably see some samples during CeBIT in March and a launch in April. GT218 is the first 40nm based GPU from Nvidia and there are at least 4 SKUs on different PCB designs. The card we are looking at right now is based on the P692 PCB design codenamed D10M1-30. The core is clocked at 550MHz and shader clock at 1375MHz. The card comes with 512MB of DDR3 memories onboard clocked at 800MHz on 64-bit memory interface. The number of shader processors is not revealed at this moment. The card supports Dual Link DVI, DisplayPort, VGA etc.

Update: Hardware-Infos' specification table cites 32 shader processors, a 64-bit memory interface, 12.8GB/s of memory bandwidth, and a 22W power envelope. A diagram posted by VR-Zone also suggests the card will have a low-profile form factor. Despite the spartan specifications, the GT218 will supposedly share its host card with 512MB of GDDR3 RAM, and it will have both greater memory bandwidth and four times as many SPs as the current GeForce 8400 GS.