How to Jailbreak Your PS3 on Firmware 4.82 or Lower! - YouTube
PlayStation 3: Sony releases Firmware 4.86 for their 13 year old console - HFW 4.86 released, SEN Enabler updated & PS3HEN to be updated soon due to no kernel changes! - Wololo.net
PS3 Still Lives With New System Update 4.87 - Siliconera
PS3 4.82 now available to download for Homebrew
PS3 System Update 4.82 Now Available, View What's New