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On a track Rich Boy track called "Drop," (listen at XXLmag.com) Polow Da Don says:

Me, myself and Mr. Sean "P. Diddy" Combs, we gonna pay somebody's mortgage in 2009. For the whole year. Go to Zone4Inc.com to register to win or pay attention to Diddy blogs.

As of now there is no mention of this on Zone4Inc.com, though there is a sweepstakes offering the chance to have Polow Da Don pay your rent for a year.

Via Theo in the forums.