MegaMacs offers the Apple Wireless Bluetooth Keyboard, model no. MC184LL/A, for $25.99 plus around $7 for shipping. That's $4 under our August mention and the lowest total price we've seen. (It's the best deal now by $16.) It features an intelligent power-management system to conserve battery life, aluminum casing, and 30-foot range. It requires two AA batteries. Deal ends October 21.
Note: While this item is new, it is bulk-packaged and may have minor cosmetic imperfections to the aluminum casing.