Microsoft's also rolling out a firmware update that gives these "old" Zunes all the new-Zune features: podcasts, Wi-Fi syncing, support for TV shows recorded on your PC, etc.
While supplies last (and trust me, they'll go fast), you can snag the original brown Zune from Amazon (via J&R Music World), Buy.com, and Costco. (Buy.com even has free shipping.) That's a helluva good deal on such a feature-packed player, and the new firmware (which installed easily on my trusty ol' Zune) really rocks.
Update: Woot's got the Zune for $84.99 today only, black or white, and you can nab a free travel kit if you order two! Wowza.