A bit more word on the D3D version of Unreal Tournament from Mark Rein from Epic here. Here is a bit of what Mark had to say:

As for D3D it's looking like it will be toward the end of next week. We really want to release for DX7 instead of DX6 and that means waiting on Microsoft to release the downloadable version on their site. We're not sure when that is but we hope to have an exact answer from them on Monday. One of the main reasons for doing the demo is for testing and as we plan to ship the retail game with DirectX7 it would be a shame not to ship the demo/test with DirectX7. Although I think our D3D performance is excellent, DX7 provides yet another nice little performance boost that's worth the wait. I'm hoping I can convince the guys to release an extra map that should help ease the pain of the couple of days we might spend waiting for DX7.