Well, I never did get around to typing up my notes from the IA Summit, but here are links to most of the presentations, in case your’re still interested:

Lou Rosenfeld’s presentation on enterprise-wide information architecture [power point].
Dan Brown’s poster and presentations.
Peter Morville’s presentation on New Roles in IA and others.
Chiara Fox and Peter Merholz’s PeopleSoft.com Case Study.
Peter Merholz’s Company and Customer Insight for Information Architects.
Erin Malone’s presentation on how site maps are used at AOL [power point].
Jesse James Garrett’s A brief introduction to the visual vocabulary for beginners and The IA of Everyday Things [both power point].

…oh, I just found the list that ASIST put together also.