253w ago - Tmaster let us know at the link above that silenoz has found a way to run simple Java games on the PS3 with the BD-J (Blu-ray Disc Java) functionality.
To quote silenoz: I've managed to launch a simple Java game on Game OS, with the BD-J functionality, thanks to the HDCookBook project. You just need to copy some files on a USB key and you're good to go.
Steps to launch Blaster Bunny, pictured below, are as follows:
1) Download it HERE and UnZip it.
2) Copy it to the root of a USB/Flash drive.
3) Go to the device in the video menu and launch "AVCHD".
4) Go to BONUS and click GAME to launch Blaster Bunny.
It has also been confirmed that this method has been working on all PS3's regardless of Firmware and region, including 2.41 apparently, and it's likely to work for other Java Virtual Machine games.
Finally, we'd like to clarify to PS3 newbies that this is not an exploit nor will it lead to non-Java PS3 homebrew, etc as CJPC detailed HERE... anyone stating otherwise is completely clueless!
Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!