On April 1, Sony removed Linux support on the PlayStation 3 through the OtherOS feature with a firmware update. Before the firmware was live, hacker George Hotz ("GeoHot") vowed to restore support for Linux.
Engadget reports that he has been successful, just one week after the firmware update went live, according to a YouTube video that he has posted.
Now, a video like this is easily faked, but GeoHot is known to be an extremely skilled hacker. While the custom firmware (CFW) hasn't been released to the public yet, GeoHot writes that it "can be installed without having to open up your PS3, just by restoring a custom generated PUP file, but only from 3.15 or previous. It's possible this CFW will also work on the slim to actually *enable* OtherOS."
Restoring support to old model PS3s is one thing, but adding support to the PS3 Slim is an accomplishment on a much larger level. Again, I'm not sure why you would want to run Linux on a PS3, but it's the principle of the thing, I suppose.