Purchased the DS4 Rev 2.0 a couple weeks ago along with 4x1GB of Crucial Ballistix PC2-6400 for my new Q6600 build. Just wanted to report my current settings are running fine, and I haven't had any issues.

Q6600 @ 400x8 w/ 1.325V (BIOS), cooled with Ninja Rev.B
DDR1000 (4:5) 5-5-5-15 T2 w/ 2.0V (BIOS)

Only have run into one issue. Loaded up to get a baseline score with 3DMark06 yesterday and was getting horrible framerates. Never let it finish a run, but was trying to check on stuff while it was running. Hit CTRL-ALT-DEL to start the task manager durning a run and found an error that was hiding. Says D3Derr-devicelost error. Anyhow, I'm not to big on benching, so I let it slide for now, but it will continue to bother me until I figure it out.