Yeah I'm sure this has been done a lot of times before. Anyway, here we go again...

http://speedtest.10-fast-fingers.com/

so far the best I could muster is:

You type 583 characters per minute
You have 107 correct words and
you have 1 wrong words

btw, does anyone type with some bastardized style like I do? I seem to only want to use my index and middle finger on each hand...terrible habit I've grown into, isn't it? :P

Good luck!