After several hours of scripting, I have completed the new display system for our work network.
bxngr allows you to define arbitrary networks in simple XML markup, with the option of linking into Spong to show system status.
It uses twopi from GraphViz to draw the graphics, along with Webdot to generate HTML hotspot maps for the graph (because while GraphViz's SVG support seems to be brilliant, I couldn't get it working in my browser).
Python glue (using xml.dom from Python 2.3) with random bits of shell script to wrap it into the Bridgeway branded webpage.
I was producing a more symettric, easy to read view, however it produces a very large image, so I feel the settings will still need further tweaking.

"grahame is studly and handsome, and I recommend him as a lover to all your single friends"
--Paul's personal recommendation