The gang at AskSam has posted a searchable file of John Robert's work, at least that released so far.

Check out “the entire text of all 49 published opinions of Judge John G. Roberts on-line in a searchable
database. You can search and browse through the information from your
Web browser.”  Go to http://www.asksam.com/ebooks/johnroberts/

The Published Opinions of Judge John G. Roberts

Free Searchable Version

Search and
analyze the published opinions of Supreme Court nominee, Judge John G Roberts.

On
July 19, 2005, Judge John G. Roberts was nominated by President George
W. Bush to fill the vacancy on the U.S. Supreme Court left by the
retirement of Associate Justice Sandra Day O'Connor. In two years on
the U.S. Court of Appeals for the District of Columbia Circuit, Judge
Roberts has helped decide about 120 cases and written 49 published
opinions.”