"Blizzard Entertainment is offering a series of special charity auctions featuring server hardware originally used during World of Warcraft’s early days. We’ve since upgraded the game’s infrastructure with the latest technology to offer an even better player experience, but these 'honorably discharged' server blades are now unique collectors’ pieces. The net proceeds from the auction will go to benefit St. Jude Children's Research Hospital."

Totally awesome to get your hands on one of these servers. For the plaque and historical nature alone. I imagine they wipe the drives before they ship them though :)

source:

http://hothardware.com/Reviews/Reitred-World-of-Warcraft-Server-in-Pictures/