Dang, the specs just keep going down. It was supposed to have 256 shaders. I seriously doubt it'll even beat 5770, let alone overclock to anything but GTX 465 max.
The word was they have them already ready, but won't release so they can sell more Fermi first. But GTX 465 being so expensive and this being so weak they aren't even competing with each other.
To me those specs sound more like GTS 450. GTS 250 had 512MB memory and 256bit GDDR3 bus, so that would be an upgrade. Really hope for NVIDIAs sake that this is not indeed GTX 460 as it would be the first DX11 card from them to sell big, but not with those specs..