I could probably even pick up my order (on my bike!) to save on shipping. When you think about it, that's really more sustainable than ordering invitations from NY that have to be shipped all the way across the country, even if that press is powered by wind from Native Energy.
Mom and Stepdad agree that letterpress is the way to go (having apparently read Miss Manners - as Bride in Exile did - and learned that the only proper way to issue a formal invitation is via a handwritten note or an engraved invitation*), and kicked down some funds to support it (yay!). Next step is figuring out the proper wording to reflect the participation of all the sponsors of this party.
* according to pg. 390-1 of Miss Manners' Guide to Excruciatingly Correct Behavior:
"In a perfect world, people would handwrite all of their formal invitations. But as we live in a world in which people wish to marry before of hundreds of their closest friends, and they claim to have more urgent tasks than copying out hundreds of invitations in their own dear handwriting, we substitute engraving.... The world is full of nasty people who examine backs of wedding invitations and run fingernails over the front in order to tell whether the thing was properly engraved. Miss Manners is one of them. Handwriting and engraving are equally correct; fake engraving and computer generated fonts are imposters."