I don't have it running yet (waiting of the CPU, OS and Mobo to ship to me from Intel) but In a week or two I should be on the following:
Case: Antec 900
PSU: Coolermaster 600w
CPU: Core i7 920
Mobo: Intel DX58SO
OS : Vista Ultimate 64-bit w/ free upgrade to windows 7 upon release
GPU: EVGA GTX 260
RAM: 3 x 2GB PC3-1600 gSkill
Hard drives: 2 x 640gb Segate in RAID 1, ordered a month apart for different batches. + 1 640 for ghosting prior to major changes.