I am always looking at different keyboards and recently I found this Ultra Mini Keyboard.  I know you are thinking, is this a Logitech?  It certainly looks like a Logitech.  From the box down to the fonts it looks like a Logitech, but actually it isn’t.  This is actually a knock off that has been packaged to look exactly like the Logitech packaging.  That said, it is actually a pretty cool device for $16.  It is about the size of a phone, includes a touch pad, and a USB receiver for your computer.  You are not going to want to type a novel on it but for basic navigation and searching it will do a decent job on your HTPC.

Favi Mini Keyboard