An up-to-date travel schedule is available on Dopplr.

2012
17 Jan – 01 Feb: The Hague, Amsterdam, The Netherlands
02 Feb – 05 Feb: London, UK
05 Feb – 08 Feb: The Hague & Amsterdam, The Netherlands

15 May – 15 June: USA and Canada TBC

2011
3 April – 5 April: San Francisco, USA
6 April – 30 April: New York, and Princeton, USA
1 May – 31 May: Washington DC, USA
1 June – 30 June: New York, and Boston, USA