My thought on all of this tech apocalypse talk is the that, while these services were great when this technology first came out and was changing once a month, a lot of this stuff has somewhat stabilized and should be able to be run on private software, or if web based access is a necessity, VPSs running open sourced web apps...

Why rely on outsourcing (which as the article stated, nobody's service is ever certain), when the personalized solution isn't that hard. Half of these services run on either open source web apps, or could be cloned with basic modifications to such apps. Even the pretty veneers they provide are open sourced in a lot of cases in the form of themes, etc for these install-able web apps (see the thousand faces of wordpress, etc.). Why rely on facebook or any of the blog services when you can have a VPS running wordpress (or drupal, or a million other services) installed in less than 30 minutes?

Take back your digital identity, I say... These sites were handy at one point but there's no guarantee they will exist tomorrow, they've proven to be cavalier with your data at best and the personal solution at worst offers an out-of-the-box experience like you get from these services and at best can give you something completely customizable.