The new version of Parallels, virtualization software that runs Windows XP in the background of OS X, is now available in a holiday "buy one, get one free" bundle.
Through December 31st, you can snag Parallels 4 ($80) alongside an extra license at no additional charge. Just hit this link—no special codes or rebates required. Then load two versions of Parallels onto your computer and operate three OSs at the same time...or something. [Parallels]