By . When a bandwagon becomes crowded, passengers get antsy. “The more the merrier” might sound good at first, but as popularity grows, the load has a way of weighing down the wheels. Sooner or later, a new bandwagon comes along. Perhaps that’s a useful way of thinking about the latest news from the college-admissions realm. As The Chronicle first reported on Friday, a group of highly selective colleges is exploring the possibility of creating a shared application that students could use to apply to one or more of the participating institutions. More...