You didn't mention an aftermarket CPU cooler, so I kind of assume you don't have one installed. For me, this was a "Lesson Learned" in my custom Core i7-860 build (see http://j.mp/cDIaS1).
Thank you for your reply and your blog was interesting to read about your build. I do have an aftermarket CPU cooler, a ARCTIC COOLING FREEZER 7 PRO REV.2 and it seems to be working fine. Just wanted to be sure that the temperatures was not too high.