Corbett v. Twitter [1]

On May 6, 2010, Pennsylvania Attorney General Tom Corbett issued a subpoena from the Statewide Investigating Grand Jury directed at Twitter, Inc.  The subpoena sought "[a]ny and all subscriber information pertaining" to the users of two Twitter accounts, using the screen names bfbarbie and CasablancaPA.

News reports [2] indicated that the subpoenas may in part be an attempt to unmask the authors of a blog critical of Corbett.  According to other reports [3], a sentencing memorandum filed against former legislative aide Brett Cott, who was recently convicted on charges of theft of service, conflict of interest and conspiracy to commit conflict of interest, identified him as the author of the blog.

The American Civil Liberties Union of Pennsylvania has agreed to assist one of the account holders in fighting the subpoena.

UPDATE: News reports [4] indicate that Cott has been sentenced, and that prosecutors now consider the subpoenas to be moot.