ipag-ng and mrtg
http://sourceforge.net/projects/ipac-ng (http://martybugs.net/linux/ipac.cgi) http://www.saas.nsw.edu.au/solutions/ipac-2-mrtg.html
Alexander
Excellent suggestions! Many thanks to all for their assistance... this list is great!
The ntop & ipag sound especially interesting (I should have specified that I happen to be looking for more of a long-term monitoring solution). I already have ntop running (nice and easy using Dag's repo!) and will check out ipag.
Thanks again, KC