LinkedIn offers Huddle Workspaces for teams to work together in a private, secure virtual environment with unlimited connections.

Create a work space for your team, share information, track activity and manage relationships inside and out of your organization across the web. ReadWriteWeb describes the application as "...part enterprise Twitter, part CRM and part Facebook for teams."

Take your team to the next level. Use this tool for real-time collaboration, microblogging, wikis, groups, mobile access and more.