You may read stories today about an "alliance" between JetBlue and Ireland’s Aer Lingus. Read the details. This is not a typical alliance — there’s no code sharing, for example. Rather, each airline will put a link to the other on their website. That appears to be it. For whatever reason, people are very excited about the idea of an airline setting up an alliance with JetBlue. That’s fine. But this isn’t that.