Sure, anybody want to know it, but in most cases the equipment used has nothing to do with the final image. You can create great images with ordinary equipment, analog or digital. You just have to learn how to use your gear and to see motives. It's still the photographer who activates the shutter, there is no automatism for making great images just because you own great gear. Sorry.
Nearly the same is true concerning Megapixels. Of course it is sexy to have tons of Megapixels, but if the builtin plastic-lens does not have the necessary quality or if the last bit of sharpness gets lost due to bad JPEG-compression, that quantity on the paper is useless.
The images on this page have at most 1800x1200 pixels, what's far less than 2 (two) Megapixel. The 6 Megapixel of my D70 are enough to create great posters with 50x70cm. So forget any Megapixel-discussion when you look at the pictures only on a computer-monitor, television-screen or a 10x15cm print.
Just look at the next two pictures, taken in 2002 with a Sony Cybershot providing a raw resolution of 1600x1200 Pixels (1.9MPixels).
Cybershot, 1/500sec, f/8, ISO100
Cybershot, 1/100sec, f/2.5, ISO100
Some of the pictures on this site really do need some special gear, called lenses. Not because of resolution or sharpness, but for some parameters which you normally won't see in advertisements or brochures.
AF-S VR 70-200mm f/2.8G ED-IF
One of these mystic things is called bokeh, which describes the behaviour of a lens in the out-of-focus areas. Some lenses don't produce real softness in these areas but some strange sharp edges in the background. If you're looking for great bokeh you'll have to invest some money in your lenses.
The two images above show the difference quite clearly. Location, illumination, motive, background (a crumbled aluminium foil), whitebalance and framing are identical, just the lens was changed (both stopped down one step). Another difference is a slight variation in color tone.
Another factor is distortion, the bending of straight lines going not through the center of the image. Especially with zoom-lenses it is normal to have some distortion varying with focal length. To compensate distortion the lens-manufacturer uses one or more non-spherical (aspherical) elements which are again expensive. When you need a wide-angle-lens for landscape or architecture images, you probably want to spend some extra money to get less distortion already from the camera.