As mentioned in blogs here and here Prism 1.0b3 got somehow released.
I have updated the version I had in mozilla:beta and moved it to the openSUSE mozilla repository (even if it’s officially beta but then there is no previous version so it makes sense).
As the previous version it’s based on XulRunner and does not contain a full Gecko release which also means if you run Prism it will find a matching XulRunner automatically (not necessarily the latest one though what I consider bad behaviour and intend to fix).