The founders of Tap Tap Tap, a developer of iPhone applications, have parted ways , and are putting their most successful app, Where To, up for sale. John Casasanta says he and Sophia Teuschler delayed the announcement for weeks because they had difficulty coming to terms for the split. Commentards are already lauding the pair's transparency, but the move doesn't speak well for their business sense. If you were selling a home, would you tell people at an open house that the sellers were divorcing? Just what a buyer wants: a negotiation with two parties who can't agree on anything themselves.