So I was worried about what to do with my pinto beans that are still on the plants. I've just left them outside to mature. They seem to be doing OK so far. Some of the plants are starting to die their natural deaths and their beans are yellowing. Hurray!
Updated (11/15/05): About 3 weeks ago I pulled off all the beans. (Most of the beans were at least yellow at this point.) Then I let them dry in a paper bag then shelled them. I don't have much hope that they will be any good as seed, but they look like normal beans. In the next few weeks I plan to eat them, so I'll find out how they taste.