You don’t need more than the fingers on your two hands to count the number of shipping Thunderbolt peripherals. Interestingly, Apple’s created and shipped a similar number of Thunderbolt firmware updates and here’s another addition to that growing canon.

• Thunderbolt Display Firmware Update, download
— This update addresses a fan noise issue affecting a small number of Apple Thunderbolt Displays and improves stability.
— Requires OS X 10.7.2 or later

Other recent Thunderbolt updates:

— Thunderbolt Software Update 1.1 for Snow Leopard
— EFI Firmware Updates for MacBook Pro, Air, iMac, Mac mini
— Apple offers Thunderbolt display flicker issue fix
— As Thunderbolt devices ship, Apple updates the software
— Thunderbolt Firmware Update 1.0 offers ‘fixes’