I was wondering how long it'd be before another affordable online gallery stepped into 20x200's territory. New York-based online gallery The Working Proof has joined the playing field, releasing a new limited-edition print by emerging and established artists each week. Mediums include digital prints, giclee, linocuts, screenprints, and mixed media pieces, and prices seem to range from $30 to $100. But, there's a twist! Each print is paired with a charity of the artist's choice, and 15 percent of all sales from the piece benefit the chosen cause. The site's blog includes fun little interviews so you can get to know the artists, too. New editions are released every Tuesday at 1:30 p.m. EDT, and you can sign up for a newsletter to be reminded when they debut.