Planetnoir is a Facebook gem if you like comics. Here is their timeline:
But check out this video of an artist demonstrating mastery of the computer tool. Actually, this video had me hooked from the minute it opened since it started by selecting a public domain superhero. Now how many of you out there even knew there was such a thing? Be honest!
Also, a hat tip to John Sutton on Facebook whose about page has some damn fine artwork on it!