Think of all the time you could save in school, work, and especially think of how many more books you could get through in your spare time. I know I would have actually had a life this last semester in law school if I could speed read.
A good friend of mine got me hooked with this site called spreeder.com. You can copy and paste anything you want to read into the program and it will help you learn to speed read. You can adjust the speed at which the words flash by and also the chunk size (the amount of words that flash by at a time). It helps you get rid of that inner-monologue or "subvocalization" and get better at comprehension while you go.
I'll put it as a quick link on the right side of the page so you can easily check it out. Also, it's a free program (I promise I'm not trying to sell anything). :)