The rumor is that Facebook will on Monday unveil a fairly full fledged webmail solution. At the same time Google is working hard on some kind of new social network. Microsoft too is trying to have email, search, social, etc. all under one roof. The rationale here seems to be one of wanting to own as much of a user’s experience as possible. It is supported by an economic logic in which companies are making lots of money in one area and using that to subsidize other parts of functionality. Once...