I have reduced the number of measurements taken by the GrabPERF system down to 24 URLs every 15 minutes.
Also, I have purged the archives and data tables of all of the inactive measurements.
I feel a little sad, yet relieved that I am starting to trim this system back. I feel that unless I get some large outpouring of support, or interest, I will disable the system entirely on April 15, 2005.

The GrabPERF Measurement script is available here if you would like to take a crack at enhancing it.