Thanks, LadyF. I devoted some time to plugins yesterday. It seems pretty easy to do bulk imports, conversions, and send-to-devices. Once on the Kindle or iPhone, an eBook will be read and trashed, because as kiwidude put it, I'll have a "master" copy in the 'server' library.
I saw elsewhere that you (LadyF) went with LN,FN in author field. Does that require a lot of re-entering author info whenever you import metadata?