Caroline Pidgeon, the Liberal Democrat London Assembly Group leader and spokesperson on transport commenting on Transport for London's plans to lift previous restrictions on information relating to London's Tube, buses and river services, said:
"This decision has my total backing. By lifting restrictions on such useful information we can now unleash the huge talent and imagination that exists amongst London's huge number of web developers. This decision will now allow innovation and exciting developments to take place in the provision of travel information. Releasing data really does help to release people."
You can read more information from TfL on the data available.
And Lib Dem blogger Mark Pack covers the story at Liberal Democrat Voice.
Also, this site shows a great use of the data, with a live map showing where every tube train is on the network. The BBC has a story here about this site.