I've been playing with the latest build of Dalai Felinto's dome corrected Blender Game Engine. This is one of the levels from Yo Frankie. Performance still a bit suspect, even running on Quad Core laptop with Quadro 3700.
We get some stitching errors on reflective objects. If the FOV is increased to 181 degrees, it uses 5 rather 4 tiles, so the stitching is less noticable, if not invisible. Next step is to try and integrate this with CLAM
BGE in the Dome from domejunky on Vimeo.