A heard somebody managed to make a multiple mouse game with this.

http://jstookey.com/arcade/rawmouse/

Ian Mallett wrote:
>  Hi,
>  I'm trying to make a two player game, and I'm wondering if there is a 
>  way to use the input from two mice simultaneously.  As far as I can 
>  tell, the answer is no, as the computer already seems to merge two 
>  inputs.  Anyway, I thought I would ask in case anyone knows how to do 
>  it.  Thanks!
>  Ian


-- 
Campbell J Barton (ideasman42)