PlayStation 3: Sony releases Firmware 4.87 for their 14 year old console - HFW 4.87.1 is already out with SEN Enabler already being updated to spoof FW 4.87 - Wololo.net
PS3 Firmware 2.70 Direct Download Link - PlayStation LifeStyle
PlayStation 3 system software - Wikipedia
Sony PS3 Receives Firmware 4.66 – Download and Apply Now