Because it is possible with the XFPS 360 adapter: http://www.xcm.cc/xcm_xfps_360.htm

Sweet i might have to try that sometime

I got that exact thing...except the pro version.
I use ot to play street fighter with the saturn pad using the ps2 converter. I tried keyboard and mouse and it worked good...but i did not spend much time testing it to be the best educated reviewer on the subject.

I heard the mouse has delays with most of the games

Does it make a difference the type of mouse?

How well does it work? Do games have delays, and how well suited is it to a control scheme that was made for dual analog?

This is effin awesome, even more reasons to buy 360.

They have a list for recommended mice to use and my mouse is on there. However I think it might be better to use a wired gaming mouse.