I think it is essential to have Internet access, but *outside* the conference. This way people can get their email done, maybe code up a patch, etc after the talks.
A gang of us were talking about this the other night, and I actually think that the consensus agreement was with you, Dimi.
The thinking is to accomplish two things: 1. No internet in the meeting rooms 2. Internet readily available right there (next room) 3. A structure that makes being in the room optional (so no one is hurt if you are checking email).
The thought was maybe to try for more rooms or more spaces within a large room, and then have 'discussion groups', that people can flow in and out of, rather than the more formal 'lecture style' we ended up with. (Or perhaps a bit of a balance in that).
Cheers,
Jeremy