Earlier this year I was lucky enough to go to the Imagine Cup finals. These are organised by Microsoft and provide a great opportunity for students from all around the world to take part in the finals of a whole bunch of different electives. At the time I reflected that when you were at the finals you were effectively at "Planet Imagine Cup" where normal rules don't apply and we could all revel in fun technology.
I'm presently in the TechEd universe. This setup is huge. Everything is bigger this year, from the venue (there is a huge extra building I've not even been in yet) to the number of sessions. They have crammed an extra day's worth of material and have provided a big thick book with tear out pages to keep track of what is going on. All the sessions are being recorded, and delegates can view the ones they missed.
I was here last year, and they seem to have found a way to make it even better. Wonderful stuff.