Schedule: http://2012.vegas.wordcamp.org/schedule/
EDIT: Here are links to all the existing presentation slides and reference material for WCLV speakers:
Amanda Blum
Presentation Slides »
Jon Brown
Presentation Slides »
Tony Perez
Presentation Slides »
Shane Pearlman
Presentation Slides »
Ben Lobaugh
Presentation Slides »
Companion Tutorial »
Sample Code »
Russel Aaron
Presentation Slides »
Grant Landram
Presentation Slides »
Brandon Dove
Presentation Slides »
Michael Schroder
Presentation Slides »
Josh Harrison
Presentation Slides »