From the Florida Bar:

The Florida Supreme Court issued an opinion addressing mandatory e-mail service this past Thursday, June 21, 2012.  The original opinion contained an effective date of July 1, 2012.  A corrected opinion and correction notice were issued this afternoon providing a revised effective date of September 1, 2012.

E-Mail service becomes MANDATORY on September 1, 2012 in civil, probate, small claims, and family law divisions of the trial courts, as well as in all appellate cases.  (E-mail service in criminal, traffic and juvenile matters is not mandatory until October 1, 2013.).

Corrected Opinion link:    http://www.floridasupremecourt.org/decisions/2012/sc10-2101.pdf