Just came across this site which I think is pretty neat. It features simulated lens images that have been matched up with different camera sensors. Gives you an idea about how the shot will look like depending on the focal length/aperture/sensor size.
The site is here:
http://prolost.com/blog/2011/1/9/the-shot-you-can-make.html
The individual simulated samples are here:
http://prolost.com/blog/2011/1/14/the-shot-you-can-make-gallery.html
The site is here:
http://prolost.com/blog/2011/1/9/the-shot-you-can-make.html
The individual simulated samples are here:
http://prolost.com/blog/2011/1/14/the-shot-you-can-make-gallery.html