Launch Java Homebrew from the PS3 XMB; Not an Exploit!
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 [Register or Login to view links] 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!