How to Jailbreak Your PS3 on Firmware 4.90 or Lower with PS3 Toolset! - YouTube
How to Jailbreak a PS3 (with Pictures) - wikiHow
The Sony PlayStation 3 hack deciphered: what consumer-electronics designers can learn from the failure to protect a billion-dollar product ecosystem - EDN
Crazy Hacks #4: When the PS3 was so weak you could even hack it with a Ham and Cheese sandwich - Wololo.net