The new version was released late last month. They have added a bunch of stuff such as docking modules, space station parts, etc.
I finally got the new version of Mechjeb to work with it, so now'll I'm hopeful that I'll be able to get to the Mun and back. The last version, I had my kerbalnauts make it to the Mun surface, but they were unfortunately stranded there. I think with the new docking capabilities, it'll open up a lot more prospects.
-Sho