BlogFrog

I just went to Blissdom and asked around and it looked like 85% of people had Cannons.  When asked why, people mostly said because that's what everyone else had.  

It's true--they are both great. My recommendation is always to handle both and see which one feels more natural in your hands.

I have a series of tutorials on my blog called Bloggography, and they're written by a Canon user (me) and a Nikon user (Manic Mother) and we do talk about differences.