For the XSi, I had originally said that it was "hard to access absolutely any manual controls." Now, I rather enjoy the simplicity of the functions. While it is definitely harder to do things as compared to comparable Nikons or higher-end Canons, it wasn't actually too bad.
I still say that overall, Nikon DSLRs are uglier with more easily accessible functions and buttons on the body. I guess that is a tradeoff. I am still undecided, but I will not dismiss Canon DSLRs as quickly as I have initially.
There is time yet before I get my camera. Perhaps I'll wait for the Canon 50D. Heh.