There is a whimsical trend in wedding cakes and I absolutely love it. The cupcake wedding cake is usually in lieu of a regular wedding cake, however sometimes a traditional cake is used for photos and the cupcakes are used for serving. In a true cupcake wedding cake, there's usually at least one cake tier (or separate cake) that is used for the bride & groom to slice through. Also, a cupcake wedding cake is usually a cheaper option than a traditional cake, and since there are so many little cakes, you can actually have a lot of different flavors!
Here are a few websites that will give you some sweet ideas :)
Your watering at the mouth just looking at them wedding planner,