I have two Interlink Electronics VP6210 VersaPoint Wireless RF Keyboards and love them.
It has a mouse thumb pad on the upper right and mouse buttons on the left. There are also mouse buttons on the front side in a natural position for your index fingers while you are holding it.
Range (I have used them up to 100ft) and quality is outstanding. I got the second one on ebay for $45, if I remember correctly.
Do not get the Versapoint Communicator model that is black and silver. This was a much cheaper quality all around.