I have a DFI, and its awesome. I've only incountered two problems.
1. I had a hard time getting into the BIOS after the first time I did. The reason was, DFI sets it up automatically so that the DFI logo displays at boot. This overlaps the initial POST screen, which goes by WAY to fast (this board just flies). Of course, after button mashing, I got into the BIOS and shut it off. Now, no problem.
2. Theres just too many overclocking feature for RAM. I initially wanted to just tweak timings, to an extent that can barely be called overclocking (I mean that in the sense that it wouldn't do much good), but I dont understand must of the settings. Its great motivation however, and I'm checking out each thing more and more. I'll get it soon.
I full support DFI lanparty UTs.