Thanks for that. As this was the first PlugLondon, we wanted to keep it all open and repeatedly said so, so all it'd have taken is ask for it :)
I didn't have any powerpoints and had to fight an estonian keyboard. However, I had several detailed questions in the pub and also while mingling from people and that was the idea. People from companies are around to ask specifics. Giving a technical walkthrough or small pair programming workshop is hard with an audience that is unknown, you never know if you'd bore half the people. This is from us API guys to you, so demand and ye shall receive. But more importantly pluglondon is about what people in London do, not what we offer, and on that score I consider it a great success.