If you can't figure out what Gladwell talked about after looking at all of these, there's no helping you!
The Twitter hashtag for Gladwell's talk was #necc09mg you can read everyone's comments there or at #necc09. Most tweets were restatements and note-taking. Many were positive. Some weren't. The pushback already has begun. Personally, I love what is happening now that everyone can have a voice, but I also have to note that this is one reason why academics are very reluctant to embrace social media. They are NOT used to having much pushback on their ideas, particularly from "the masses!"