I found a nice website which is for full-sized boats, but has lots of short, basic articles of props which help shed the light on a lot of terminology, what rake is all about, cupping, ect.
Very helpfull for people that want to try and do some shaping to help tune their prop to their own boat setup. The ultimate last step on getting the most speed out of your boats power and definetly for experimenters.
Just follow the guide on the left of the page and it walks you through all the major aspects. [8D]
http://www.rundquist.com/intro_repair.htm