Six months goes by and the two major DSLR manufacturers release a bunch of new models. I updated my FOV Calculator to include the Canon Rebel XSi (EOS 450D) and Rebel XS (EOS 1000D). Note I always use the numeric model number as the XT/XS/XSi nonclementure is confusing IMO. Also added are the Nikon D3, D300 and yet to be released D700.
As always if you see an error in the camera specs or calculations please let me know.