The
easiest way to monitor clients is using a program called FAHLogStats
which can be gotten from here, and enabling ftp on
each of your clients. This program generates a webpage showing
what your clients are processing and useful stats such as how long each
frame is taking to complete, time to completion and flags used.
You can easily run the program from a windows machine and either view
the webpage in internet explorer, or publish it to your website using
an ftp upload script.