Remember this old Easter egg from Google link.
I want to know: is it possible to have the cursors from two mouses on one Mac? I am able to dualscreen.
The Google Multitask Mode is one of Google's fantastic April Fools jokes. Although technically possible to connect multiple pointing devices (USB mouses, Bluetooth mouses, trackpads, rollerballs, etc.) so far as I can tell, OS X presents only one cursor for all connected devices. This posting at SuperUser discusses this question, and one answer points to this software as a possible solution. YMMV.
Note: my boss just came into my office as I was testing this by using two hands on USB-connected mouses, and my nose on the Magic Trackpad. All three moved a single cursor, as expected. I just got a raise for ingenuity and creativity.