I discovered 3eanuts, perhaps the greatest use anyone's yet found for Tumblr, when it was roughly three months old, and have been following it since. The concept is simple: as put by its founder Daniel Leonard:
Charles Schulz's Peanuts comics often conceal the existential despair of their world with a closing joke at the characters' expense. With the last panel omitted, despair pervades all.
I found today's "biversary" (is that really a word?) especially serendipitous since I reference the site on my essay "How to Tell a Good Joke," which will be published on DIAGRAM in April. So get yourself addicted to Schulz-Minus-One in the meantime, if you're not already.