Since our wedding isn't til October, we both came up with the idea to send out Save the Date cards (it was weird, we both suggested it at about the same time), which I think I'll do in a postcard format, but I'm torn on the invitation style.
I could do a fun, different and colorful one:
or a really elegant, classy one:
but either way I think I'm going to end up making them because a) it's fun; b) invitations are expensive!; and c) I can control the weight of the paper so it's cheaper to send in the mail.
Here's a really cute DIY idea that I may modify a bit and do: