Best frosting for Devil's food cake

I second the 7 minute frosting. I love it with a rich chocolate cake. Here's the one I've used forever.

http://www.epicurious.com/recipes/food/views/seven-minute-frosting-238014

Some ideas for garnishing the cake, some not strictly frosting.
Given the desire for something light, dust the cake with confectioner's sugar, or top it with a dollop of whipped cream.
Consider serving the cake naked and with some fresh fruit.
Go big or go home: add a chocolate ganache or buttercream icing.
Go slightly sour: add cream cheese frosting borrowed from carrot cake recipe.
Go light in texture (but not sugar or calories): make a lemon or an orange curd, and puddle it around the cake.
Go old-style: raspberry coulis and a few berries added to each serving.

I'm partial to Seven-Minute Frosting, as that's what my mom always made for our birthday cakes when we were kids. I think it's a great counterpoint to the chocolate.