There's a basic fact, the room can only hold 150 people, and at that it's going to be crowded, and maybe hot. While there's no guesswork about the size of the room, everything else is an art, not a science.
That said, here's an almost-certainty: Some number of people won't show, or won't be there for all the sessions.
If your number is greater than 150, you will be asked to wait until the next session starts, and if there's room, you can go in, if there's not room, sorry, you can't. It's pretty simple. No one knows if there will be room, and since this is a free conference (no one pays to participate) there can't be any guarantees. But if you really want to participate, come, wait, and with any luck, you'll get in.
I guess that the first sessions on both days will be the most full and that there will be more room in the afternoon sessions. That's just a guess, and we put interesting sessions at the end of both days to try to even things out.
But even if you don't get in to all the sessions, there's free wifi in the lobby, and there's likely to be a good schmoozing scene, even though we try to keep things lively in the conference room, I'm sure there will also be interesting conversations outside.
Postscript: To be people who have signed up and know they're not coming, it would be a good idea to mark your place in the list with "not coming" so people with higher numbers can make better guesses.
Here's a heads-up on a project I'm doing for BloggerCon IV that involves OPML.
During the conference, Murphy-willing, Doc Searls will act as the conference technographer. This means that he will use an outliner to take notes of what's being discussed, and the outline will be projected so that everyone in the room can see the outline.
We've done this before, it can have very interesting results, kind of like instant outlining but there's only one outline, and it's all real-time, there's no latency. When it really works it's like magic. Of course we hope to achieve that result this week.
The HTML version of the "Doc Nography" content will be here...
The OPML version is here...
The next BloggerCon is in San Francisco, June 23-24, 2006.