Is it possible to open two Bridge windows (or instances) or have two Content tabs open simultaneously? I often alternate between a couple projects or more and it would make life much easier if I didn't have to ... well, I suppose I could create tons of "favorites" but, honestly, then there would either be a ton of them and/or I'd have to change them so frequently and ... okay these are definitely First World Problems, but still ...
You can open two windows but it may affect performance. Also, if one window is updating (say, in a large folder) then the other one may not update until the first is done.
You can have two Bridge Windows up concurently but not two Content Panel (exclusively) from the same Window open. It's been a long standing request from Bridge that never seems to rise to the top for getting done.
That notwithstanding, I often open two Windows and move files from one Content Panel to the other. However, as Lumi says, if you have many files that are building previews, it may take a while before you can start work. If this is what's happening, go get a cup of coffee and then get to work! ;>)
Are Multiple Content Panels supported now in the current version?
You say "beta", but what is the release number of the version you talk about?