TECH CRUNCH - June 25 - Habbo Hotel, the under-21 social network that was forced to close down earlier this month after it was revealed that people were using it to send sexual and other illicit messages to underage users, is now open once again. Sulake, the Finnish company that owns Habbo Hotel, two weeks ago “muted” activity on the site as it scrambled to implement better content and safety controls. Today, the site is un-muted in Finland, Spain and Brazil to test out those new controls. The company has put in a much stronger algorithm to monitor for dodgy content.