On April 1st, Twitter co-founder Biz Stone posed a question on a company blog: "What is Jelly?" The answer, he said, is a new company and product named after the jellyfish. Unmentioned in the post is that Jelly is the second jellyfish-themed product with which Stone has been associated. Before Jelly, Stone advised a lesser-known Q&A startup named Fluther. A fluther — it rhymes with "brother" — ref