Well, after a week and just over 2,000 shots, I'm going to weigh in with my opinions.
(No sample shots because they all suck ok
)
Things I love:
Things I don't love:
I'm chuffed to bits with it, and glad I picked it over the 400D. Lovely stuff, would recommend it to anyone.
Next on the purchase list is a Sigma 10-20mm, a Nikon 18-200mm VR, and a Sigma 30mm f/1.4. This is going to bleed me dry...
(No sample shots because they all suck ok

Things I love:
- The handling. It's positively tiny for a dSLR but it's amazingly comfortable, and manages to feel pretty durn solid without weighing a ton—something I didn't expect from an all-plastic construction.
- Battery life. Not unique to the D40, of course, but as someone who upgraded from a compact I'm absolutely blown away. 1300 shots from a single charge? That's insane to me.
- The speed. Again, not unique to the D40 and again accented by the fact that I upgraded from a compact, but it's so awesome for pretty much everything to be instant. I also love that it goes into a sleep mode, so you can walk around with it "on" all day and not run the battery down, yet always be ready for an instant shot.
- Auto ISO. A minor thing, but it's a real timesaver that's got me more than a handful of shots that otherwise would've turned out a blurry mess. You tell it the maximum ISO you want to use, tell it the shortest shutter speed it should come in on, and if necessary it bumps up the ISO to get you the shot. I'd much, much rather have a noisy shot than no shot at all, but leading onto my next point...
- High-ISO performance. I've not had a bash at ISO 3200 yet but 1600 is perfectly usable and much, much less noisy than I expected.
- The menus. Yes, I'm shallow, but this is important to me. The D40's menus are well-designed, look lovely and are completely customisable, which is neat.
- Shoot-until-your-card's-full when shooting JPEGs, not like the sporadic shoot until your buffer's-full and then wait and then fill the buffer and then wait on the 400D.
- The kit lens optically. It's not tremendous, but it's better than I thought it'd be. It'll serve admirably as a stopgap solution until I've saved for an 18-200mm VR.
- The LCD screen. It's mahooosive and bright and bold and wonderful.
Things I don't love:
- The build quality of the kit lens. It's no worse than I expected, of course, and the lens is still incredible value. They had to scrimp somewhere, it just means I'll upgrade later that's all.
- RAW+JPEG only stores "basic" quality JPEGs, making it much less useful. I still find it more useful than shooting RAW-only, though.
- No exposure bracketing. I can understand why Nikon dropped this, but I would've found it useful. No biggie, though.
I'm chuffed to bits with it, and glad I picked it over the 400D. Lovely stuff, would recommend it to anyone.
Next on the purchase list is a Sigma 10-20mm, a Nikon 18-200mm VR, and a Sigma 30mm f/1.4. This is going to bleed me dry...