does anyone have anything to say about this camera. I want to buy it for my gf for christmas because Consumer Reports said it was the best buy, but I know nothing about cameras.
Depends on the experience of your GF. If she’s an accomplished photographer and/or has a bunch of lenses in the closet, the D40 wouldn’t be the best choice. If she has old lenses, then you should investigate getting a camera body which will fit the lenses. Glass is expensive! If she’s an accomplished photographer, she might be better off with a slightly more advanced camera body.
If she likes taking pictures for fun/enjoyment, then the D40 is a great choice. I really enjoy mine. If she doesn’t print pictures larger than 8×10, the 6Mpixel D40 is perfectly good. Otherwise, you may consider the D40X. My only gripe about the D40 is the exposure tends to blow out the highlights. This is easily corrected if you shoot in Program mode and provide an EV correction of -2/3 or -1/3.
Check out Ken Rockwell’s site. He has a lot to say about the D40 and other cameras. He also has a very nice guide on setting up the camera.
http://www.kenrockwell.com/tech.htm
Be sure to get a 2 GB, or larger, memory card. She’ll need it.

Nikon has some comparison information on their camera line. If it’s her first slr it would be a good gift but it’s really kind of an entry level slr. If she is really into photography or if she has film and wants to switch to digital than this would probably not be advanced enough for what she’ll need or want.
I would recommend Nikon though, whatever you decide to get.
References :
http://www.nikonusa.com/fileuploads/pdfs/DSLRCompare.pdf