Ditto, what the previous poster said,Cachemate for the Palm and also you might want to check out GSAK as well for any of your cache management needs. You might want to get in touch with Gobler as he is using both and could really help you get started on the right foot. I know he is helping Kacky to use it as her favorite E-book application, Mobipocket, is going to be discontinued soon. Welcome to the paperless club and if there is anything we can do to help just let us know.
Check out the links section as well and there might be some good tutorials there explaining both of their uses too.