ok thanks i will look into it so i can get a trackball running even if my xbox has no usb connections?
yep
There is no way to get a USB mouse/trackball working on Xbox (unless it is through PS2 adapter), as there has been no software written that support it with drivers, so a device like these with a PS2 KB/Mouse/Trackball is the only way to go, if your interested in using em for Xbox.
I ordered the Max Shooter yesterday. It was rated best of the bunch at teamxbox.com, for those kinds of peripherals on Xbox, and it is also about $10 cheaper than the SmartJoy Frag.
I have seen many reports of it working excellently with Xbox games, but when I get mine in a few days, I will report on how well it performs with MAME on Xbox (Using a mouse for the test, before I shell out the $100 for a trackball, but I imagine the results will be close enough to gauge its usefulness).