A beautiful and disturbing piece of data visualisation. The numbers are quite astonishing.
Monstrously beautiful images, accompanied by an eye-witness audio account.
Gravity's rainbow on a Google map.
BBC coverage of the bomb blasts in London
A photo pool of pictures relating to the bomb blasts in London today.
The Guardian blog is keeping a running update on events in London.
A Wikipedia entry on today's bombings is proving to be a valuable resource.