We've covered a number of art vending machine projects here on Boing Boing, but most of them have been a single-machine installation.
In Portland, OR, Taylor Valdés has made a business out of machines scattered throughout the city that dispense art, used books, mystery bags of goodness, and other productized whimsy. Oh, and pregnancy test kits. To date, she has 18 Venderia machines throughout the city, in shops, bars, and a hotel lobby.
[H/t Laurie Fox]