A few links for live updates and notes of DrupalCON's presentations
DrupalCON live update, day 3
DrupalCON live update, day 2
DrupalCON live update, day 1
DrupalCON webcam
Drupal in Media Communities
Usability -part 2
Drupal Package Management
Drupal Undelete
extreme usability - part 1
on mysql drupal and foundations
search modules demystified
node access
killes on mail api
cris messina on microformats and drupal
Two
Two more:
http://www.webschuur.com/relations_system
http://www.webschuur.com/files_communities