DIWA member and Slovenian website e-fotografija have a great comparative review of the new Canon EF-S 10-22mm f/3.5-4.5 USM (pictured) and Tokina AT-X 12-24mm f/4 lenses, with plenty of sample shots for all you non-Slovenian speakers.

Website: e-fotografija - Canon EF-S 10-22mm / Tokina AT-X 12-24mm f/4 Lens Review