As you may have read, there was a rumor and some reports about a DirectX 10 patch for Gas Powered Games' famous RTS, Supreme Commander. A new info on the developer's offical message board has revealed that there will be no such patch.
The post on the developer's message board reads: "The availability of DX10 hardware, final releases of Vista itself, and the solid drivers simply did not line up with the necessary time frames in our development cycle.", so they focused on graphical improvements that will benefit a far wider audience. You can find the post here.
There is also a v3251 patch released yesterday from Gas Powered Games's that includes a large number of game tweaks and balances, as well as several bug fixes and improvements.
You can get it from Gamespot here.