Well, if want to know the nitty-gritty of the overclocking features, that's something I don't know as I haven't been able to risk overclocking this expensive stuff yet ($1500 on a computer is a lot for me). However, from the experience I've had thus far just using it normally, it's been pretty stable. I do recommend flashing the BIOS right when you get it if you don't have the latest version, they fixed quite a number of things (I think 507 is the newest version as of now).
My only complaint thus far is with my memory. Maybe I'm doing something wrong, but I have Corsair XMS2 6400 (2x 1GB sticks) and the timings are supposidely 5-5-5-12, however if I set these timings and the frequency to DDR2-800 (and voltage to 1.9v) I get a ton of errors in memtest...so I left the settings on auto in the BIOS and everything is stable.
However, it's running a divider...and my cycle time is off...

. So I have no idea what's going on there. However, like I said, I love the board. It's got a nice set of features, but it's not bloated with full SLI or Crossfire support, something I don't need. Works great with the E6600 from what I can tell thus far.