A couple days ago McZonk gave us a progress report on his PSP port of the old classic PC game Quake II, and now he's released a fully-functional, multiplayer beta of the game. While
this beta is already looking quite impressive, he stresses that the current code base is still somewhat buggy, so report back on any bugs or glitches you encounter over at his blog.
Also, don't think that McZonk has given up on the single player side of the Quake II PSP port. For now, he's focused on multiplayer and once that's finished, he'll move on to porting the single player aspect of the game.
Download Quake 2 PSP Multiplayer Beta