Download a London tube map for your iPod while you still can.

The New York and San Francisco transit authorities have slapped a cease-and-desist letter on, citing breach of copyright.

It wouldn’t surprise me if London Underground does something similar. Government copyright issues are much less liberal in Britain than they are in the United States, and wouldn’t surprise me if Transport for London will want to remind the site of the recently-introduced Re-Use of Public Sector Information Regulations.