Michalis, ikitat, c-era, davorg, and le:
Thanks for the suggestions. I will hopefully get a chance to test some of them out this weekend. And I will post an update once I get something to work.

I actually have a followup question which some of you and others might be interested in addressing, but I will need to work on setting up a simplest case version of that section of the code to keep it simple (and real).

I should probably post the whole thing on my website once I get it working and beat it into some kind of respectable shape so that someone else with a similar need can have at it. :)