I just had hardwood installed throughout my house, including my kitchen, when I moved in to this house a few months ago. The kitchen previously had Pergo, but I didn't care for it, and in it's place went with pre-finished hardwood. I absolutely LOVE it. Having the hardwood in the kitchen doesn't pose any problems - cleaning is easy, the "feel" of the floor is comfortable, the the look is dynamite. Swiffers work great in keeping it tidy. I am also able to have a 5 x 7 rug in the kitchen, and it looks beautiful against the hardwood. If I had a problem with my choice, it would be that my dogs find it somewhat slippery to run on.
I priced out granite countertops, but it was beyond my budget, so I stuck with the formica that was here. I'd love to replace the countertops within the next year or so - probably with a manufactured granite-look product.