I have just released my first attempt at a Lua-based game: Solitaire Mahjongg for the PSP, a Kyodai/Shanghai-like board game.
The game features both single player and two player hotseat modes.
Currently, only a standalone version for FW 1.5 is available. I plan to release both standalone versions for other firmwares, and a Lowser-friendly version for Lua Player soon.
The game is available from abinitio.no, as well as screenshots. Feel free to mirror this game.