Youssef Sarhan, the Irish designer whose UI advice Tumblr, Yo Zuck!, earned him fame, a job interview with Facebook, and a job offer from a Helsinki startup, has turned his sights on Twitter. Mr. Sarhan’s newest Tumblr, Yo, Dick! Implement This, repeats the gag of Yo Zuck!: Mr. Sarhan nitpicks at Twitter’s design and logic. Users can @ reply themselves, but they can’t retweet their own tweets? Sup with that? Stay tuned to see if Twitter calls Mr. Sarhan! What say you, @dickc?