Open APIs led to some of the biggest anti-Facebook stories over the last two years. I'd also like to see external clients and so on, but I don't expect that, given how many problems that brings.
Facebook got into trouble for opening data about users to its business partners. I'm sure this is not the same kind of "open API" that you would use to access and control your account and your interactions with the Silo. However, this kind of API will empower you to use a client that allows you to spend less time on Facebook, the opposite of their strategy.