Virtual worlds developer Metaplace has raised $6.7 million in a second round of funding. Participants included existing investors Charles River Ventures and Crescendo Ventures, and new investors Marc Andreessen and Ben Horowitz. The San Diego-based company, formerly named Areae, has raised a total of $9.4 million. Metaplace was founded in 2006 by MMO vets John Donham and former Sony (NYSE: SNE) Online exec Raph Koster. The company, which is currently in invitation-only beta mode, lets gamers build and share their own virtual worlds.