[ALUG] Wireless keyboard with trackball for Linux - any experience?

Does anyone here have any experience of using a wireless keyboard with trackball built in with Linux? E.g. something like:- http://www.kenable.co.uk/product_info.php?referer=froogle&products_id=1789 I guess it will probably "just work" but I'd like to be sure there aren't any odd issues before I buy one. It's for a multimedia (well more of a photo display) box to go with the big new TV. -- Chris Green