Nice shots, the colours are little off, one thing i notice from using my 400D and Nikon D200 is 400D tends to produce photos that have more blue and green felling to them, but easily fixable in photoshop.
Interesting, I’ve actually noticed the opposite! I own the 350D and 30D, but I’ve spent a lot of time shooting with the D1x and D2x and always felt the Nikons produce an ever so slight green tint not present on Canons. Ah well, as you say it’s easily sorted, especially if shooting RAW.
Paul