Nice shot saint-jake, but it looks like your rotate needs a wee bit more cropping. There appears to be a tiny white sliver of background peeping out from the bottom left.
WOW! This is a stupendous thread. Absolutely gorgeous photos and a fabulous array of images - really shows the versatility of these lenses. For sure it has removed all of my fears of buying an ultrawide lens and using it topside. I can't wait now!!
The only question for me now is Sigma 10-20 and save $250 for other goodies or Canon 10-22??
Here's another couple from me, taken with the Canon 10-22 from last week:
This is a rocky hill, covered in spinifex (veeery prickly, no bare legs) in the Pilbara region of Western Australia (on the road just north of Newman, to be precise):
http://www.pbase.com/simonb/image/48316912.jpg
and, when 10mm on the 20D just isn't quite wide enough, you have to stitch two:
