Why not be a little different with your wedding and have a heart shaped wedding cake. Everybody expects a round, rectangle or square cake shape, so take the chance and make the leap to something more fun.
alexia dives posted Green and purple wedding cake with swirlies. This is the first cake I've seen and really liked! Of course I'd replace the purple with blue :-) to their -wedding cakes- postboard via the Juxtapost bookmarklet.