Ok, thanks to the Frogatto developers! We are allowed to carry the Frogatto port in Extras / non-free. For the impatient, I've uploaded the current development snapshot to extras-devel.

The frogatto package contains the desktop file, start scripts and icon and depends on the frogatto-data and frogatto-engine packages. frogatto-engine contains the GPLv3-licensed game engine, so this package is in extras-devel / free.

I'm told there will be a 1.0.2 point release soon, so that'll probably be the first version to go into extras-testing. IMHO the biggest issue of the Maemo port right now is ongoing CPU usage when the screen is locked: the music is paused, but SDL_mixer happily continues to play silence instead of really shutting down.