According to PerezHilton.com, JK Rowling has filed a lawsuit against the publisher of the London Star Map.

The celebrity map reportedly has details of the Harry Potter author’s London residence and clear instructions on how to get there, something Rowling considers ‘a gross invasion of privacy’.
In a statement, J.K. Rowling said, “The sole aim of London Star Map is self-evidently to incite, encourage and enable members of the public to track down and locate the exact location of private residences of various recognisable “celebrities” so that they can visit those residences.” Rowling continued, “I’m a very private individual who regards my family’s privacy and safety as having paramount importance. ”

At this point I am not sure if this is true, if it is proven to be false I will post an update.