I received my free1 MOO MiniCards yesterday morning and could not have been more pleasantly surprised at how good they looked (see the MOO MiniCard pool for examples). I must admit, I wasn't expecting too much because (1) I knew they were going to be tiny and (2) they were free, but I figured I'd give them a shot because, well, they were free.
For brevity's sake I'm going to bite Cory Doctorow's Boing Boing post and say that it's "hard to convey just how cool-ass these cards are. They feel like a fetish object, the thick card and soft laminate finish create a great hand-feel, and they're visually stunning — playful and intensely personal."
I can totally see myself using these when I eventually start selling prints of my stuff.