I would get one of these! http://www.zeigermann.com/cartoonist/2007/07/23.html
Its called a Gocco machine for those of you who aren't familiar. Essentially it prints like a press for t-shirts (silk screening) and allows you to personalize your paper.
See what it can do!
I'm totally in awe of people's invitations when they are done with this machine. I would love to own one. Anyone know where I can fimd one for inexpensive?