PS3 Firmware 3.10 Full Change List & Direct Download Link
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 Firmware Update 4.90 Released, Here's What It Does
PS3 - 4.89 Update is Live! - Discussions / Details about the firmware update | Page 16 | PSX-Place
Surprise! There's a new PS3 firmware update - here's what patch 4.88 does | TheSixthAxis