One of them -- Kevin Ritter of Timeless Kitchen Design -- even sent a link to a kitchen he did that featured tin wall tiles and concrete countertops. Looks good, doesn't it? I've also experimented with staining concrete (your garage floor is a great place to experiment), and you can get some nice color tones -- copper is one of them.
There's an Instructable for making your own concrete countertops, if you'd want to take that on. It looks challenging and time consuming, but quite possible for the handy.
I don't know what I'll end up doing, but concrete is definitely worth thinking about. It would add a nice industrial edge to my traditional cabinetry.
