mwave offers the IOGEAR Multimedia Wireless Keyboard, model no. GKM561R, for $35.99. This $8 mail-in rebate drops it to $27.99. With free shipping, that's a buck under our December mention and the lowest total price we could find by $12. This 2.4GHz keyboard features a laser trackball, scroll wheel, 19 multimedia hotkeys, on/off switch for battery conservation, and more. It requires two AA batteries (included). Rebate expires January 31.

Note that while this keyboard is Mac compatible, the multimedia hot keys are not supported.