Remember when T-Mobile launched Bobsled back in April, which enabled free VoIP calls between Facebook users? I didn't either, but now that it's added mobile apps, browser apps, and the capability to call regular phone numbers, it's way more memorable.
JaJah is an app for Android (and soon to be iPhone) that lets users make free phone calls to Facebook friends without punching in their phone number. It's neat! The people you call don't even have to have a JaJah account. All you do is select them in the JaJah app and they'll be pinged through Facebook chat.
Fring wrote us today with news that they've created a service called fringOut that allows for worldwide Internet calling starting at .01 per minute. The service is available now for Nokia and will launch "soon" for iPhone and Android.