Not true--there have been a series of alpha and now RC releases of 0.13. Chris and Nathan and the others are working on both Sass and Compass in parallel.
I just tried the pre-release version of 0.13. I found it was installing something with native binding? I believe it was one of the dependencies on Compass. I don't think this works well for us as our build process relies on Maven with JRuby to power Compass.
