Re: Wide angle lens for 10D
They seem to work with almost any camera body and can be used on film and digital. As far as I know a few people here use them.
I have the Tamron version and it does work on all my Canon EOS cameras....but I wouldn't go as far as saying I atually use it! 
On cropped digital sensors it's OK and does the job but think I'd still rather have a 17-50mm f/2.8 if one can be found within budget.
Andrew
A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away. - Antoine de Saint-Exupéry