Woo-hoo! FI taught me Photoshop and InDesign, so I designed our STDs and uploaded them to Vistaprint. We added the linen texture to them, and I love them - especially for $30 for 100 of them! (We also got return address labels with the logo on them.)
I've got about half the envelopes already addressed, but I can't send out the STDs until FI finishes the wedding website!