what is the optical resolution of my Microsoft IntelliMouse
w/IntelliEye 1.0 usb mouse?

Microsoft reports that the IntelliMouse with IntelliEye can capture
6,000 pictures per second. Resolution wise it rates at 300 dpi (dots
per inch) for TIF, and 72 dpi for JPEG.

For more information on the technology, visit the links below (the
second link is images of all Microsoft Mice, but it does have the
actual resolution numbers):

http://www.microsoft.com/hardware/mouse/tech.asp
http://www.microsoft.com/presspass/images/gallery/hardware.asp

I think you want to definitely get a refund on the above answer - he's
just given you the resolution of the pictures of the site! The mouse
takes 1500 images per second and can process 18 million instructions
per second (your typical optical mouse can process 1.5 million
instructions per second). This is the "resolution" you are referring
to, as it all boils down to how many times a second the mouse scans
the surface it's resting on in order to figure out whether it's moving
or not.

Website below states 1500 images per second, but the above is stated
at 6000, take your pic.

http://www.arstechnica.com/reviews/4q99/msmouse/msmouse-1.html