Tools for displaying usage statistics on a web-page ?

We have a new requirement to display real-time and historical
cluster utilization on a public web-page.  It's very easy to
extract the instantaneous data using Torque's "pbsnodes" and Maui's
"showq" when you want the status of nodes, processors and jobs.
It's this data which I would like to go on a web-page.  It would
also be nice to have Torque user and group accounting data in
a graphical form (we generate accounting using the simple "pbsacct"
scripts from ftp://ftp.fysik.dtu.dk/pub/Torque).

Question: Do other sites have some nice tools for displaying such
usage statistics in the form of HTML and graphics on a web-page ?
The simpler the better, of course, so that it'll be easy to maintain.

I suppose that something similar to MRTG (http://oss.oetiker.ch/mrtg/)
is needed - perhaps MRTG can even be tweaked to do the job (?).

Thanks for your input,
Ole Holm Nielsen
Dept. of Physics, Technical University of Denmark