How Open will Facebook be well all is said and done?

I am truly shocked to be saying this, but I am kind of in agreement with Valleywag on this one. It really was only a matter of time before Facebook replicated applications that (a) were seeing significant adoption and (b) were core to their user experience around communication utility. I don't fully agree with the premise that all application developers are doomed, but I am skeptical of investing in applications if their sole purpose is for use within a social network. There needs to be an out of network value proposition, whether it is in the digital world, mobile world or offline. More innovation is going on outside of Facebook than inside of it, which will continue, but it is interesting to see how the new regime at Facebook may be limiting the value of that innovation as it is showing signs of closing its highly touted open doors to recreate an AOL 1.0 like walled garden, albeit in the Web 2.0 era.