Have you tried the emboss resist technique? It's pretty easy--just stamp and heat emboss any image, then when it's cool, sponge or stamp ink over the top. The ink doesn't stick to the embossing, and you get a really cool look! I cheated and used pre-embossed paper for this card, actually, so it was even easier--just stamp and sponge.
Designed this for my team to make at our party last weekend. Everyone loved it, and I know the future brides and grooms that receive them eventually will be pretty impressed with their mad stampin' skillz.
Here's the inside. Do you stamp inside your creations? or stamp on the envelope? Extra fancy!