Seriously, a million thanks! I will definitely try Jet Pack again. Gradually I am learning more about this whole topic, and realizing that while plugins certainly are fun and advantageous in many respects, they sure can lead to problems and overload. Between our group site (the one you are helping on) and our personal websites, we are discovering that streamlining is VERY important.
I am now working on Luminescence for my personal site too! Thanks for letting me know about the options for social plugins, and that an update is coming.