I'll throw in my endorsement for the Canon 10-22 EF-S lens. I have one, and really like it. Very crisp images with rapid USM focusing.
I'd post some images, but I'm at work, and my work has now filtered my online photo site, so I can't access.
If you go to smugmug.com, and search for borismd, you can see my photos, and I have a large group of 10-22 images there.
Regards,
Boris