Trade:
2005 Mavic Ksyrium Elite Shimano freehub. ~3,500 miles, never wrecked. Came stock with my 2005 Cannondale.
Looking for:
Tubular rims (preferably 24 hole or less)
White Industries Hubs -or- DT Swiss Hubs (yes DT makes a 24hole 240s hub, its in the 2006 QBP dealer cataloge/book)
Spokes
Tubular tires