A while back, MG told you about Caleb Elston’s new location-based chat app and service called Yobongo which lets you chat with people in your general vicinity. Creepy for some, cool for others, it nevertheless is a new way to communicate with people you may or may not know. I caught up with Caleb at SXSW and he was able to give a few more details about the “Affinity Algorithm” running behind the scenes, and how it will help shape the relationships you build with the app. Video below.