In theory it is in development. In practice it is likely to become summer for the release.
I can't promise anything on this one! Esp. if you care about graphics and audio quality

Simon Sunnyboy/Paradize -
http://paradize.atari.org/Stay cool, stay Atari!1x2600jr, 1x1040STFm, 1x1040STE 4MB+TOS2.06+SatanDisk, 1xF030 14MB+FPU+NetUS-Bee