Flockr generates digraphs out of your flickr contacts. This is what has triggered me to go off the straight & narrow path of low level programming into hacks with Graph networks and x-mixed-replace. Anyway, what is done is done - take a look at a canned demo if you are on Firefox 1.5 and above (can't host cgi scripts).
Now, I'm off hacks for a while ... time to vent some energy on real code.--
An empty canvas has more potential for greatness than any painting.