The MySQL Con has done something amazingly intellegent. Taped down to the floors in all the session rooms and meetings rooms, there are power strips. No matter where you sit, there is a powerstrip within a couple of meters. So instead of spending time looking for power outlets and having clumps of people gathered around the few outlets around the walls, you can sit where you want, and take notes and do research while listening and speaking.
This is something that all other tech conferences would do well to emulate.