BTW, I've ported PieSpy from Java to Perl (irssi script incarnation), you can get it here together with some sample output (ie. latest FreeNode #perl social network). It does similiar thing like the chatterbox monitor, but with IRC channels. It includes a neat cute-looking layouter and renderer (nothing ugly like GraphViz), I'm in the process of CPAN'izing that part right now.