at Microsoft HQ on 6 Nov 2014 – 8 Nov 2014

at Sheraton Gateway Suites O’Hare on 19 May 2014 – 23 May 2014

at Hilton Montreal Bonaventure on 25 Feb 2013 – 1 Mar 2013

at Microsoft HQ on 2 Nov 2012 – 3 Nov 2012

at 3rd aVenue South on 20 Apr 2011 – 22 Apr 2011

at Montreal on 10 Mar 2010 – 12 Mar 2010