Whenever I travel for business, I'm always on the lookout for cool postcards to send to my sons. I usually end up with lousy postcards instead.
There also aren't many postcards that convey the feelings of a homesick business traveler. ("Good news kids, I'm across the street from Disneyland without you all week!)
Jeff Bruckwicki of Nock Co. (and other awesome stuff) created a set of Sad Day Series postcards, and they are quite lovely.
He needs a minimum of 10 people onboard in order to go to print. I'm motivated purely by self-interest here. Go buy some, so I can get mine.