Today Liga BBVA released the 2011/2012 La Liga Schedule.  Highlights for FC Barcelona include the following:

First league match is August 21 against Malaga.

Real Madrid vs FC Barcelona will be played on December 11 with the return leg at home on April 22.

The first home game for FC Barcelona will be against Villarreal on August 28.

Complete FC Barcelona 2011/2012 Schedule here

For the entire La Liga schedule here: http://www.rfef.es/calendario_primera.html