Geohot writes on his blog that "this 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." He also takes Sony to task for removing the feature in the first place, saying it is "potentially turning 100000+ legit users into 'hackers.'"
The YouTube video we've embedded after the break purports to show Geohot's PS3 booting Linux thanks to his custom v3.21 firmware. He hasn't put a firm date on the release of the hack, but simply divulging its existence was probably more than enough to get Sony's lawyers drawing up the paperwork for a cease and desist.