This website is pretty cool, if you've ever wondered how fast you type. It's not the most accurate calculator in the world for your top speed, because it takes an average and you have to read at the same time, but it's pretty good.
free online touch typing speed test - wpm words per minute
My best speed is 83 words per minute with 100% accuracy - I'm actually faster but I often go back and correct myself as I type so my accuracy is less and my speed is more but effectively it's how productive I am. 83wpm is a far cry from what I used to be like before I learned to touch-type! I think I can probably get up to about 90 but it would be difficult and my accuracy would drop a lot. Compared to how it used to be, a pretty dismal 10wpm... it really is amazing how fast you can learn to type if you put your mind to it.