Here is how most conferences will look in the very near feature even if it will take time and the social experience may happen outside of computers, I think for non-geek people it will actually happen mostly on phones.
File... Open... YOUR MIND. Well my mind could not be more open during the entire week and I got such a strong experience, a different experience. I have never had that networking experience in a conference. Usually a conference is like a mass media, you sit down and listen with few or no interaction. This time was different at E-tech, there were more messages coming from the audience than from the panels.
Here is the secret sauce of the explosive cocktail:
-Prepare the sauce ingredients on a wiki and let it grow during the conference
The wiki of the conference was started about two months before the conference, the participants started to subscribe their blog address and other information about them on it, things like a walk in San Diego were self-organized the day before the conference on the wiki. To have a better idea of what happened on the wiki before, during and even after the conference, have a look at the wiki updates list.
-Make wifi and juice available everywhere

Wifi was everywhere in the hotel and the conference rooms. Free of charge, of course. But do not forget juice, make power plugs available under the seats in all conference rooms so that everybody can focus on participating not on when their laptop battery is going to die.
-Gather some of the most authoritative bloggers and mix them with baby bloggers

Q "How many of you are bloggers"
A 98% of the audience, and the 2 other % are fixing it during the conference, it was like if you said "do you have email ?" ten years ago. Stupid question. Of course we all blog, how could it be different ?
That was just fantastic, many people were blogging the conference during the conference so everybody who missed the conference could know what happens there in real time, and most of the time the first comments arrived on their blogs before the end of the presentation of the panelists. Some questions were actually asked as a result of discussions started on blogs during the sessions.
-Add a lot of Apple juice

Never seen that many macs. Clearly not representative of the computer market. I actually switched only 6 months ago and I love it, I even did some shopping after the conference...

What I discovered during the conference was the power of Rendez Vous thanks to Felix. You could see in real time everybody who had Macs in the conference, chat them, drag and drop their ims from RDV to your own IM, listen to the itunes they share, see a list of websites or weblogs they host on their own macs... Totally cool.
Here is one of he more strange experience I had thanks to Rendez Vous: I was sitting close to Dan Brickley during a conference and I really wanted to meet him as I knew he started FOAF. I started talking to him very quietly in order not to make noise and Dan immediately without a word pointed his finger to my Mac. On his Mac, he opened Rendez Vous, found in two seconds my im and started a chat by saying "this is a much better way to chat during a conference".
The speech was a little boring so we chatted most of the time during the sessions even though we were sitting close to each other. Of course we could have get out of the room and discuss there but that would have been rude to the speaker and disturbed their session.
After an hour of chat, pasting interesting urls to each other of what we do or of our interests, we got a lot to know each other. When the session ended, we talked to each other briefly and we were friends "Are U a friend YES or NO" (TM).
-Add a conference moblog

-Open a conference chat room
This was just amazing how many people interacted in the chat room #etech while the speakers were talking. It was totally out of control and either extremely interesting ("I have a question to ask what do you think of it") or totally useless ("I need to go to the restrooms"). But the bottom line is that I was logged in irc very often as I thought extremely useful to understand what the room and the Internet users thought of the presentation in real time.
Many "Fact check my ass" happened as each time people had a question or a doubt about what was said they were either asking precisions in the chat room or googling what the speaker just said. Some speakers got many "that is bullshit" or "this is only a sales presentation" seconds only after they said something that was not adding value.

People used also the chat room to physically meet during or after the conference, organize the lunch, the dinner, joke etc.
-Project the chat room when the panel talks
Simply total transparence. Everybody could just see what everybody would think about the speaker, the topic, the questions to be asked, the urls concerning the talk, etc. Quite weird but totally entertaining !
The hardcore version of that is the hecklebot that was used during Joi's panel, people could directly post comments to the screen below, that speakers could see. It was totally uncontrolled but an interesting experience...

-Create a trackback link for all conference sessions so that people can find quickly what bloggers think and say about the sessions
-Technoratize the sessions
so that people can also see what bloggers say about the conference.
-Manage the side effects
Have a rescue force available for people chatting while they walk, have dinner, people non invited getting in or protesting at the lobby, people crashing because they chat and blog too much, people advertising brands on their heads.
Be also careful that the speakers speak loud enough as with that many bloggers the keyboard noise is quite high and surprising the first time you hear it. Just imagine say 100 bloggers in one room typing on their keyboard at the same time.

Here is what I expect in the future to happen in addition:
-The participants will create even the programme of the conference
-The participants will self organize conferences, using tools such as meet-up
Would you like to see this way of managing conferences in the future or would you hate it ?