The following is from UFC.com:
The Ultimate Fighter Finale Weigh-In
Date Time: 12/07/2007 3 to 4:30pm PT
Event Type: Fighter Appearance
Location: The Pearl, Nevada
FREE AND OPEN TO THE PUBLIC!
The Ultimate Fighter Finale Weigh-In at the Palms Hotel & Casino will be held in the Key West Ballroom (near theaters) on the first floor.
Doors open at 3pm Pacific Time.