Via Brooklyn Bride
There are lots of ways to achieve this look, but of course, most of them require hiring a graphic designer. If you're looking to go the DIY route, check out Wordle.net.
You enter in a string of text [your vows, old love note, random words associated with your upcoming wedding] and it automatically generates the text block. The font, colors and orientation are all editable, to create a pretty neat work of art to grace invitations, thank you notes, or program.
Both of these were generated by entering the blog's address. I'm thinking this could make an incredible thank you note card! Opinions?