I'm looking to upgrade from the Nikon d40x?

I'm looking to upgrade from my Nikon d40x. I have an offer to buy a friends very well taken care of d3000, but I'm worried the "upgrade" will leave me disappointed. I'm looking into the d90, but want to make sure it's really worth the money.Am I going to see the difference? Does it give me better options on focal points? I know it's not the camera that makes the picture, but the photographer… But I want to make sure that I have the right tools. Thanks.

Added (1). The link the first poster put does not work?

Added (2). Thank you Jim. Unfortunately, my shutter curtain broke on my d40x, and it will cost me just as much to get a new camera as to fix it. While heartbroken, I figured the good that can come out of this is that I can splurge the couple hundred on an "upgrade". I 100% agree with the new glass… But I need a body first.

Actually, my opinion, you don't need to upgrade your camera - your lenses perhaps - but not your camera.

I say that because of what we regulars here call the mega pixel myth - that being more is better. That's not true. It's just marketing fodder for the manufacturers who want you to spend more cash.
More really is better if you're planning prints the size of a small car. If you're doing normal photo
prints up to 11x14, 10mp is excellent.

I shoot a Canon 1000D, also 10mp, but I've added Canon's 28-200 as my standard, every day lens and it's made a wonderful difference. The glass is the key. Yes you're correct, the photographer does make the real difference but when you talk about "tools" it's not nearly so much the camera (with SLR units) as it is the glass.

Your camera is capable of excellent photos. So I'd recommend a glass upgrade.

Jim is right, your D40x and a second or third lens will give you more options when shooting various subjects

The D90 and its replacement, the D7000 is indeed an upgrade and will allow you to use not only all of Nikon's AF lenses, but AI manual focus lenses as well.

For decades photographers used a single focus point and were able to shoot brilliant photos, more points just gives you more options for focusing the lens without having to recompose.

Look at it realistically. If you used your D40x enough to wear out a shutter there must be things you missed on that cam. What are those? Think about those and post and you'll got a lot better advice than us yelling random camera models at you.

Yes Nikon D90 will be really a good upgrade
# Live View with contrast-detect AF, face detection
# Image sensor cleaning (sensor shake)
# Movie capture at up to 1280 x 720 (720p) 24 fps with mono sound
# IS0 200-3200 range (100-6400 expanded)
# 4.5 frames per second continuous shooting
# 3D tracking AF (11 point)
http://www.amazon.com/...001ENOZY4/
http://www.bhphotovideo.com/...&KBID=7390
http://rover.ebay.com/...m270.l1313

Also can consider Nikon D7000 16.2MP DX-Format CMOS Digital SLR
http://www.amazon.com/...0042X9LCO/
http://rover.ebay.com/...m270.l1313