Somewhere along the roadmap, we realised that instead of moving things step by step, we would be better off working on multiple steps at the same time. Otherwise it would have been refactor one feature, add legacy support for other feature and would take twice the time.
Also, since the plugin is getting independent of BuddyPress, the identity needed to reflect it, so we decided on working on rtMedia 3.0 directly. We did plan a beta on the way, but the flow dictated that we move faster towards completion.
As of now, the stable working copy of rtMedia (for WordPress) is available here. You can download and test it out. It has the anywhere uploader and anywhere media functionality and works with all post types. The latest development version is on different branches.