Sjurk has released a great new game (and nice website too) written in Lua, heres the info:
Solitaire Mahjongg is a freeware game, developed in Lua by Sjur Kristiansen for the Sony PSP. Get the game and installation instructions in the downloads section.
Solitaire Mahjongg is a game of strategy, memory and luck. It uses 144 Mah-Jongg tiles, arranged in a pile called "The Dragon". Match the titles in pairs to clear the board and win the game.
You can play either a laid back solitaire game, or a fun two player hotseat challenge.
Features
Single player solitaire
Two player hotseat challenge
Classic Dragon (or Turtle, as some call it) board layout
Classic Mah-Jongg tileset
Small footprint. Only takes about 1.5 MB on your memory stick
Freeware. This game will cost you zip, nada, nothing.