I'll start. The New Zealand Institute of Mathematics holds a conference every year, a different location and topic each time. In 2006, at Taipa, the topic was geometric topology. Jeff Cheeger gave an excellent plenary series of talks on spaces of Einstein metrics. He and Tian proved certain collapsing results for these metrics, laying the framework for compactifying moduli spaces of Einstein metrics. There were two talks in the morning, and one in the evening after dinner, leaving the afternoon free for activities such as windsurfing. If you can make it, I recommend it. This year (January 2010) will be on quantum topology (although I have to say I won't be able to go).