Just released GUCA version 1.2. It includes some nice new features that are still in beta. If you're looking for stability, stick to version 1.1 for the moment. If not, then test away!
Today sees the release of version 1.1 of GUCA and version 1.1.0 of the Conversion Engine (C# and C++). These releases are stable, have many bug fixes and new features.
Also, version 0.91 of Saab (free, Gurmukhi Unicode font) was released just three days ago. Go get it now!