I need to create a sign-up sheet on a SP 2007 site for an upcoming conference. During the conference, attendees will be split up into groups to discuss 9 different topics of interest. I need a sign-up sheet that will allow for an attendee to sign up for a particular topic. Once the slots are filled (6 available for each topic) I need that topic to drop off the list of available choices so no one else can sign up for that topic.
I have investigated using a custom list as well as a survey for this, but am struggling with finding a way to eliminate the choices as the groups fill up.
Thanks in advance for any help.