markhb writes: "T-Mobile has announced Bobsled, a Facebook app which enables VoIP voice chat via the Facebook Chat interface. Plans for the future include video chat and apps for Android, PC, and tablets. From the announcement: "Once downloaded, customers can use the Bobsled application for Facebook to place voice calls to their friends through Facebook Chat with just one click. This is one of the first VoIP application seamlessly integrated into Facebook Chat, which makes it quick and simple to place an impromptu call to a Facebook friend. The application eliminates the need for dialing – users simply click on a friend’s name to start the conversation. There’s also no need to remember screen names or to input numbers. With the new application, customers can also leave a voice message for friends when they’re not available. Anyone on Facebook can receive a call; no application download is required to receive a call via the Bobsled application for Facebook. " No word on how this is going to make them any money."