I bought one. I haven't gotten around to installing it yet, but it just setting in the palms of my hands when I bought it gave me the hives.
Cannot wait to play with my new laser mouse. I've been waiting and waiting and waiting for these to be available in japan. Finally today when I went into the PC shop nearby they had it.
It was 9800 yen plus tax and comes with Japanese box and manuals. But I don't care as long as it works fine with my English OS.