I wrote a couple of perl scripts that run on each machine and find out how many files each user has on each data disk. The way this works is that there are two scripts that run on each machine. First is gen_disk_listing, which is just a find command that generates a list of all the files on the data disks. Second is find_data_disk_hogs which separates the files by owner. The last script is run on cdf which creates a webpage from all the data gathered.