The date for the GIS Tech in 2012 is already set: the 17th of April at the World Trade Center in Rotterdam.
For more info see: www.gistech.nl
The largest GIS event takes place in San Diego, California at the 23rd of July 2012. We look forward to meet you there.
For more info see: http://www.esri.com/events/user-conference/index.html