"what would i say?" automatically generates Facebook posts that sound like you! Technically speaking, it trains a Markov Bot based on mixture model of bigram and unigram probabilities derived from your past post history. Don't worry, we don't store any of your personal information anywhere. In fact, we don't even have a database! All computations are done client side, so only your browser ever sees your post history.
The results are often hilarious (and sometimes nonsensical) -- it all depends on what you've written on Facebook.