I sold a pair of wheels to someone on here a couple of years ago (Scant? Jez?) - Nuke Proof hubs laced with Ti-Dye titanium spokes to Campagnolo Atek rims.
They have the honour of being the lightest set of wheels I've ever owned, and the most fun - it was almost like someone had laced a set of wheels up with elastic bands. They flexed, but they just flew along the trail at an amazing pace. For that reason alone I still regret selling them, but they're definitely not 'everyday' wheels - fit them with Conti latex tubes and some 1.5 Cross Countries and run them as a set of race wheels....