Michael Vassar, former president of the Singularity Institute and current Chief Science Officer of MetaMed, is currently visiting Europe and wants to meet up with Less Wrongers there. His schedule is:

25 April: Berlin

29 April: Estonia

8 May: London

12 May: Oslo

16 May: Nice (but may be able to meet people in Paris?)

26 May: Home to USA

If you have a meetup group in or near one of these cities, or you can put some people together, he's interested in talking about the Singularity, optimal philanthropy, and his work with MetaMed. You can reach him at michael.vassar[at]gmail.com