Australian company Shintaro offers the Wireless Media Center Keyboard (SHKEYMCE) designed for use with Windows Media Center. The ergonomic media keyboard features a built-in 400dpi trackpad and integrated multimedia hot keys. It uses the 2.4Ghz RF 4-channel technology offering up to 10 meters of range.
The Wireless keyboard comes with a USB receiver. It works with also WIndows ME/2000/XP/Vista. Two AA battries are needed.