Brian and Ryan showed some really cool microformat applications. A demo is proof enough for one to understand how powerful semantic web documents, that can be processed by computer applications, are. For starters, try this for a demo:
Open/integrate the icalendar file into your calendar application
XForms by Steve Pemberton was eye opening. Truly class stuff. I did not know about XForms before. Though it might take longer to get accepted and deployed, it is certainly the future of forms on the web.
Being blissfully unaware of search engine technologies, I did not have a great time following the paper presentations. But most of them had interesting observations that anyone following stuff on the net could relate to.
For me "the person" of the conference was Bebo White. He was the most lovable person. The child-like enthusiasm he showed when he saw our poster was infectious.