I am a righty but I use my mouse with my left hand all the time. It's not that hard. If you really can't get used to using your less familiar hand for something like a mouse then you should probably consider re-naming yourself Roger_the_Retard.
I too am left handed, but I have to use the mouse right handed because IT didn't plan ahead when buying the ergonomic mice. GRRRRRR!
Any other Lefties feel discriminated against? lol
Oh well, it frees the proper hand up to "hunt-&-peck" more efficiently. HA! :-P