These are very creative, and often replicated in other campaigns. I'm not sure who specifically created these, but here's an interesting site that links to a gallery of them. Take a peak...http://www.absolutad.com/absolut_gallery/singles/
I did a whole project on the advertising done for Absolut in Rhetoric a few semesters back. TBWA is the agency behind these great ads. http://tbwa.com/
Jen-- thanks so much! I was trying to find a good site that had a bunch of them. And Michelle-- I was in that class and I was hoping you'd see this :) I KNEW you'd know!