For 10 exciting days this October, Perimeter Institute’s Quantum to Cosmos: Ideas for the Future (Q2C) will take a global audience from the strange world of subatomic particles to the outer frontiers of the universe. All events will occur on-site in Waterloo, Ontario and online at q2cfestival.com
October 15-25, 2009 Waterloo, Ontario
You can attend in person, but I think all events will also be streamed live online.
There's a good list of speakers already.