I know that a number of other people have posted tutorials, but I figure you can never have too much information!
I just finished a new build with the Core 2 Duo E6600, Tuniq Tower T-120, P5B Deluxe Mobo, 4 gigs G.Skill DDR2 800, EVGA GeForce 8800GTS 640MB, and Win XP x64 in a Thermaltake Armor VA8000 case.
This is not an advanced tutorial, more like an intro to how things go together, so it's fairly basic. But there's lots 'o pretty pictures!
Hope someone finds it useful.