The Icarus Interstellar Starship Congress event in Dallas is over but you can watch the many interesting talks via Youtube. The videos span many talks over many hours but you can use the Schedule to find the general location of a particular talk and then skip ahead to that spot on the time bar.
[ Update: Harold “Sonny” White works on advanced propulsion at NASA’s Johnson Space Center in Houston, Texas and he has gotten a lot of attention on his research into warp drive concepts: Meet the NASA scientist devising a starship warp drive – New Scientist.
He was a keynote speaker on Day 3 of the Starship Congress: Dr Harold “Sonny” White: “Warp Field Physics: An Update” – Icarus Interstellar. His presentation can be seen on the Day 3 video.]
Update Aug.30.13: The program schedule now has links directly from each talk to the position on the video where it starts: Schedule | Icarus Interstellar