Thanks to all for the kind words about the script. It sure is gratifying to know that folks find it useful and that they've found no major problems with implementing it (so far). My site was sadly lacking in the "historical data" department, so that was my motivation for the project.
I've added links to my scripts page for the folks who have posted above, but would very much like to hear from anyone else who is finding the script useful. It makes me feel good. If you'll either post a link here, PM or EMail me, I'll make those additions.
Thanks again. - Jim