I purchased a PS3 backward compatible from ebay for a good price and I'm impressed how clean it is. However... It's still on firmware 2.50. Should I update the firmware? : r/PS3
PlayStation 3 — Wikipédia
UPDATE: v2 released] PS3 HEN (Homebrew Enabler) now available for all console revisions | Page 3 | GBAtemp.net - The Independent Video Game Community
PS3 firmware update 3.55 released, does nothing for you – Destructoid
Geohot releases PS3 jailbreak for firmware 3.55, world ceases to have any meaning | Engadget
How To: Install kmeaw's 3.55 CFW [PS3] - YouTube
Sony PlayStation 3 60 GB Console CECHC03 Firmware 3.55 (FW 3.55) PS3 SACD Great. 711719699750 | eBay
PS3 gets Firmware 3.55, adds nothing | VG247
PS3 Firmware 3.55 Coming Soon
PS3: CFW Evilnat 4.89.3 released - Wololo.net
How to install PlayStation 3 custom firmware, run homebrew - AfterDawn