Limbo, which bills itself as the world's largest mobile entertainment community, just announced that they passed the one million mark in registered U.S. members, and that they now deliver more than 20 million messages per month.

The company created a series of Limbo-branded games, auctions, shows, alerts, and social networking applications for phones, all in the name of contextual advertising. We wonder if Limbo users are aware of this--TechCrunch reported last year that Limbo auctions make the company richer but offer little chance of actually winning items.

Still, earlier this year, Limbo was named a finalist in two awards ceremonies from AdWeek Media and the Mobile Marketing Association, due to its joint mobile promotion with Verizon Wireless for Disney's Pirates of the Caribbean: At World's End.

Limbo Community Soars Beyond One Million Members [Limbo]