We've been waiting for the decision on Quon to clarify Constitutional issues of employee privacy while using an employer-supplied electronic device. Bottom line: by unanimous decision, the Supreme Court ruled that, under the facts of this case, the search was reasonable and Quon had no 4th Amendment expectation of privacy. I say "under the facts of this case" because the Court ruled on narrow grounds.
Justice Anthony Kennedy stated quite eloquently, "Because the search was motivated by a legitimate work related purpose,
and because it was not excessive in scope, the search was reasonable."
In my opinion, that's a beautiful sentence.