I am hearing reports of the Canon EF 8-15mm f/4 L USM Fisheye Lens being in the wild.
is indicating that they have the lens in stock and DCFever.com
says the 8-15 should be available for sale starting yesterday (thanks David & Thomas).
Hit the country-specific eBay link at the bottom of the Canon EF 8-15mm f/4 L USM Fisheye Lens Review
placeholder page to see lenses available right now in your country.