When I purchased a Pro account on Flickr a few months back, I get to print 10 mini cards from Moo for free (inclusive of shipping, y'all). A box of 100 mini cards will costs you from $19.90 to print.
A few weeks ago I put in my order to them. The mail arrived yesterday with my 10 pack mini cards.
Très cool! But of course, I mostly printed Mira's photos. It was a bit daunting to only be able to select 10 out of hundreds. So, my safest bet was to pick hers.