I wasn’t able to attend Wordcamp 2006 because basically I won’t be going anywhere near an airport for the next decade 
so I’ve been looking for any goodies on it…
I just noticed today that Matt Mullenweg’s keynote address for WordPress 2006 is up on Google video!
http://video.google.com/videoplay?docid=-7587757814963421312&hl=en
Yay! Thank you to whomever posted that. He looks and sounds like he is 16! 
I feel sooo old.
Mark Jaquith has also promised to post some audio recordings. I hope he recorded his talk about WordPress performance as I am looking forward to hearing it.
Other places to see/read what happened so you don’t feel so left out include:
http://flickr.com/photos/tags/wordcamp/
http://wp-community.org/
http://markjaquith.wordpress.com/?s=wordcamp
http://wiki.wordcamp.org/index.php/Main_Page
Unfortunately, I left the recorder in the main room for that hour, so the talk wasn’t recorded. I am, however, planning on posting a followup post or series of posts on the subject.