I hadn't seen http://zazzle.com/wedding+invitations before either, so now I'm curious how weddingtype.com would be different. It'd be good to think about a couple places where you might be able to differentiate by focusing on this particular niche. E.g the ability to add extras to the card such as ribbon. Also, one thing I didn't like about Zazzle was that I can't order just 1 invitation. I'd be nervous about ordering 200 invitations I'd never seen in person and would want a sample first.
