There are tons of compound interest calculators, I probably didn't make myself clear. I was looking for something where I could calculate a group of different cd's with different maturation dates and rates. So, I think for now I will just have to do it manually. I want to play with results, predicting future rates (higher and lower) to get an idea of how this form of retirement savings will hold out.
Thanks to everyone! I am learning so much about all of this - even though I have just scratched the surface.