I've ordered all of the componenets that I am going to use to build my CP, however I am now having second thoughts of adding a trackball to the mix as well. I have never been interested in adding a trackball to the CP layout, but after I saw how much $ I am going to be dumping into a project like this, I might change my mind and do it all the first time. The question is (and I did a search, but from the 20+ pages of results, I didn't get an answer), how will this interface with my CP? Will I have to purchase another "IPAC'ish" board to hook this thing up, or does it just have a USB plug on it that plugs into the PC? Once installed, does it act like a real trackball/mouse for a PC? If so I should be able to play Arkanoid (and other "spinners") with it right?