For anyone curious about the jailbreak past of the Ps3 then take a look at this page. Spend some time reading up on all the past and present PS3 Jailbreak methods. Absolutely lots of facts on there to keep you busy for a long time.
Heres the link
Early exploits depended on the actual built in Java of BlueRay menus. Java on the blueray had been way too limited and just a small buffer overflow was discovered. At the same time the otheros option had been updated by Sony permiting Linux on the console Through the process of running different tools on linux elements of the PS3 system can be investigated. It wasn’t long until Geohot posted “hello hypervisor, im geohot” to his blog. The ps3 scene was outraged with what happened next! On the 1st April other OS was removed by Sony “due to security concerns” All hope seemed to be lost and the scene was getting much quieter again. Geohot claims he is leaving the scene due to getting the blame for the loss of other os.