** EDIT : Sorry nemesis... I didn't see your post, and i forgot to check coldDeath's location... Anyway, search for one of those mouses, depending on how much money you have...**
Some recommendations:
- really cheap... 7$, sunbeam 800dpi
http://www.newegg.com/Product/Produc...82E16826178003
- 12$, logitech 800dpi
http://www.newegg.com/Product/Produc...82E16826104001
- this one is excellent. Logitech MX518, 1600dpi, 32$
http://www.newegg.com/Product/Produc...82E16826104178
If you don't need new mouse urgently, save some money and buy MX518...
I have MX510, and it works perfectly; and this one is even better.