This is a way old thread, but perhaps still of interest to someone out there ...
Anyway, I can highly recommend the Vipassana Center located on Mont Soleil in Switzerland for anyone seriously interested in meditation. They offer intense 10 day silent retreats on a donation basis only. I attended one this past March and was blown away by the amazingness of it! You are woken each morning by gong at 4:30 am and meditate away in bliss until 9pm each evening. There are, of course, pauses and time to eat in between but anyone who goes should be prepared for some serious meditating time.
The instructions are given in English with translations in either German or French. Each evening there is a lecture by the master and participants may choose to listen in English or in their native language. All in all a very positive experience for me.
http://www.sumeru.dhamma.org/english...h_outside.html