There's a topic on the SteelBook Hunterz forum showing a newly announced American SteelBook for the PS3, X360, and PC versions of Elder Scrolls IV: Oblivion 5th Anniversary Edition, which is being released on the 28th of June prior to the fifth game, Skyrim
http://thadump.net/sbhunterz/index.php?topic=5877
No details regarding which retailer/s will be stocking it, but a pretty nice (if a little plain) SteelBook!
Here's a few pics:
