DH and I had a four-tiered cake with staggered tiers. The concept is this:
except the tiers were different sizes.
The bottom tier was chocolate, and the second-to-bottom tier was white. Those were the two tiers served at the reception. We got the top two tiers to take home. The top tier was supposed to be chocolate, and the second-to-top tier was supposed to be swirl, but they were backwards, so we got a bit of a surprise when we cut into our top tier on our first anniversary and found swirl.
I'll see if I can find a good picture to scan in.
I was adamant that I did NOT want the standard one-tier-on-top-of-the-next, buttercream and fondant, whiter-than-white wedding cake. I was also adamant that if there was going to be a cool groom's cake designed around DH's tastes, that there would be an equally cool bride's cake designed around my tastes.
But we didn't have a lot of guests, so we just went with the one cake.