On the bottom of each session, you’ll see 2 counts. Plan to Attend and Interested.
When the site first becomes live (~4 months before the event), every session starts with 0 interested and attendees can not click “plan to attend”. Anyone who is registered can mark interest in a session. It’s more a curiosity than anything else because the interest is very proportional (for the most part) on how long the session has been listed. Notice on Douglas Crockford’s sessions that his “Talk with Crock” session only has 2 people interested. This is because he just listed this second session, not a reflection of true interest. When attendees register the first time, it explains this.
After the sessions are put on the agenda for the world to see with times, we “interested” not show anymore, and encourage people to press the “Plan to Attend” to let us know they plan to attend that session (they can only plan to attend one session per time slot). This is explained in emails to all attendees. That is, all attendees need to tell us what they plan to attend so we can allocate room sizes appropriately. Our rooms vary from 250 to 40 so it really matters, especially with 25 sessions at a time.
Also, just a side comment on what happens when you select Interested or Will Attend. You of course have to be logged in to the site to do this. When you do click your choice, the count does not change. The reason for this is programmer lazyness. At somepoint we will fix this. It’s actually an xmlhttp post so it is very unintrusive to your browsing experience. The numbers are also cached so that every session display (session painting is slow enough with 180 sessions listed) does not go back to the database and count interest level of all sessions.
One final note. Will Strohl, the DotNetNuke User Groups Team Lead and Media Module Team Lead asked me what the difference was between interested and not interested which inspired this post. Will is new to the bay area and is doing 3 sessions this year at Code Camp. Make sure you introduce yourself to him and welcome him to both camp and our wonderful part of the world when you see him. You also might remind him to change his profile to not say he based in the Orlando area any more
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That’s it for now. Hope this explanation helps.