Geforce 8800 GT doesn't do DirectX 10.1
Documents seen by Fudzilla indicates that G92/D8P aka the Geforce 8800 GT is not Shader model 4.1 compatible. It can mean one of two things, one, that Nvidia doesn't want release the information or two, simply that this chip doesn't have support for Shader model 4.1 and DirectX 10.1.

This comes as an interesting surprise as we know that the RV670 aka the Radeon HD 2950 series will support Shader model 4.1 and DirectX 10.1.
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Nvidia can't keep up with demand
Nvidia could not keep up with the quantity of orders that they've had in the last two quarters. AMD has failed to offer a high end killer card and as such Nvidia had more orders that they expected.

This lead to a chip shortage and this upset a lot of Nvidia partners. Upset is a light understatement as the Nvidia only partners are furious as Jeff the Fish, the boss of the sales team and Fiona, the boss of the European sales department couldn't fill many of their orders.

This is actually a good thing for Nvidia's stock, as Nvidia claims that it has never sold more chips, but it's still not good in the long term. as the company has managed to upset most of its supporters.
Fudzilla