Would be nice to have a plug-in to collect statistics like CPU hours given time
frame, computer idle hours, number of builds performed, etc.
There even could be some weight per slave based on cpu number/speed or simple
benchmark like computing apps like SETI do.

Besides interesting that would give a picture if the the whole setup is under-
or overloaded as well if nice graphs are present, one could see if some triggers
can be moved to other hours so systems are more evenly loaded during the
day/week/month.