Effectively eradicating recent speculation that the next edition would be celebrity-based, CBS has announced a nationwide casting call for Big Brother 9, starting this Saturday in Los Angeles and wrapping up Dec. 8 in Tampa, Florida. (Go to CBS.com for a complete list of tryout venues and dates.)

This ninth cycle of the typically summertime reality competition will air "in 2008," says CBS, "on dates to be announced." Meaning, "as soon as Julie Chen can get back in training for how to say, 'But first.... '"