It's shaping up to be an almost battle between the live video streaming services. Twitter just recently launched their own service called Periscope, but they weren't the first one out the door. Meerkat caught mobile users' attention when it made its debut at the recent South by Southwest (SXSW) tech and arts festival in Austin. People thought that Twitter's entry into that still very small market will mean Meerkat will go away meekly. But don't count them out, as they have just announced that they are opening their Android beta for testers.