at Sheraton Gateway Suites O’Hare on 24 May 2011 – 27 May 2011

at Amsterdam RAI on 18 May 2011 – 21 May 2011

at San Jose, CA on 19 Oct 2009 – 22 Oct 2009

at San Francisco, CA on 11 Oct 2009 – 15 Oct 2009

at Amsterdam, The Netherlands on 11 Jun 2009 – 13 Jun 2009

at Chicago, IL on 19 May 2009 – 23 May 2009