I was looking at the same two cameras trying to decide which one to go with, I'm pretty sure I've decided on the D5100 though. I have the D3000 now and I really like the ergonomics of the Nikon over the Canon, to me it just seems easier to reach everything.
I got the book "The Complete Photographer" by Tom Ang for Christmas. Was just wondering if anyone has read it and what their thoughts were on it. I'm just now starting to read it, hoping to learn a thing or two. :)