In addition to posting the slides and content from presentations, taping the presentations and posting them would be beneficial.  Most of the good presentations don't have the majority of their content in the slides.  This includes any discussions that spin off of questions during the presentation.

This is a good idea, but it brings a large amount of logistics with it as well.  First we have to have sign off by speakers to allow for the taping of the session.  Second, and the harder one, is to get equipment that can effectively record the sessions.  The venue does offer this type of A/V support;however, it is quite costly.  I will keep it in mind for next year.