The XTracPads Mad Dotz try to overcome the weakest link between a mouse and the
mouse pad - the glide feet. The Mad Dotz greatly reduce the friction between the two
parts and make mouse movement a lot easier and increase the speed greatly. At a
price of just under four US Dollars, these Dotz perform well for a limited time.
http://www.techpowerup.com/reviews/XTracPads/Mad_Dotz