I have the very same problem with the radio buttons. Stonebreaker, can you be more specific about which template and where the code should be inserted?
I have tried the select box rather than radio buttons. The select box calculates properly and allows shipping, but it is unstable, and defaults always back to local delivery when a different shipping method is selected, even if the shipping amount is registered correctly with the different shipping method.
The site is http://www.samaycoffee.com