From the front page of UFC.com:
UFC ® Press Conference Special Announcement
UFC ® President Dana White will be making a major announcement at the UFC ® 82 PRIDE OF A CHAMPION pre-fight press conference in Columbus, Ohio.
UFC.COM will feature the official announcement at 1pm EST. Look for video highlights of the press conference featuring Dana White, along with a special guest, making the announcement later in the day.
Dave Meltzer had this to say about the announcement:
UFC has a major announcement coming in the next 24 hours, but all of a sudden it probably won’t be so big.
I’m taking that to mean it won’t seem so big because of EliteXC landing a deal with CBS. So the big question is this: is this going to just be the UFC rehashing the Yahoo deal, or is this going to be some real new news? While all signs point to this being some kind of TV deal, the ‘with special guest’ thing might mean it’s a fighter signing of some description.