Hubble is an interesting project from the Uiversity of Washington which monitors and reports on internet black holes.
These are “situations where advertised paths exist to the destination, but messages – a request to visit a Web site, an outgoing e-mail – get lost along the way.” Since September 17, 2007, Hubble has found 887,917 black holes. (Not many, when you consider overall internet usage?)
It is planned to expand the real-time reporting to include assessments of why each hole exists. Thqat will be interesting.