In an interesting, if not completely unanticipated development, Google Scholar has added the capability to search patents, case law, and legal journals. The advanced search allows further tailoring of your search to only federal courts, or specific state courts. The "How Cited" tab gives some citation information for the selected case, but nothing that compares to Shepards or KeyCite (yet).
This addition to the free legal web is sure to cause a stir, and hopefully generate ever improving access to our nation's legal information (a basic human right, according to President Obama).
And on the subject of Google, some lawyers love it for workflow issues. 
