Doug Fox has been been tracking how bloggers have been interacting at live, f2f, meetings via their blogs. In this post he mentions:
Right now, there is no convenient way for presenters/attendees to reference educational sessions.
I think he is getting at the fact that there is no way with most meeting event web sites to find out who is blogging them live or immediately after the fact.
This sounds like a job for trackback. Attendees could ping individual sessions so that other attendees can see reaction and feedback in a central place. As a matter of fact, Ben and Mena Trott did exactly this for the Mac OS X Conference last year.