I don't think there have been any updates to either XCSoar or TopHat that allow operation on the Oudie. Both projects have stopped development for the Windows Mobile/CE systems. While Microsoft still sells the OS, there are very few new devices that are being sold. As a result, the interest and development effort for the platform does not exist in either project.

On the other hand LK8000 seems to still have a few interested developers for the platform, but I've not heard anything about using it on an Oudie.