This morning Apple released a new adapter for its customers so that they could use their firewire accessories with Apples new devices that come with a Thunderbolt interface. The Adapter retailes for £25/$29 and is currently only eavailable at the Apple store online.
Later in the morning Apple pulled the new adapter from their website and removed it completely, even with the use of the search function the item was not shown. The pull from the Apple store could be down to the product being released to early of an error on the products page. The Thunderbolt-To-Firewire adapter is now available for purchase again on the online Apple store which can be access from the links below.
Apple Store: USA
Apple Store: UK
Source: Cult of Mac
Source: The Verge