Thanks, Vince. I have a meeting this morning with our IT folks to take a look. Like so many others in this industry, our relationship with IT is delicate, and since our users aren't down (they're on version 10, using the SDE service, not direct connect), I chose not to "correct" IT's assignment of "Priority - Standard" on this one. But I did catch someone in the hall, who understood the problem's magnitude, so hopefully I will have the solution soon.
Thanks again for the direction; these tips plus the Google-learn have been informative!