I don't get it. Facebook isn't working out so they are considering a change to MySpace or Tumblr? How about changing your focus to oh I dunno ... your website!? Moving from one free, closed-garden system to another isn't progress.
This - it's so dumb to cry about that. Build your brand on our website, your own social network, & your own smart phone apps. They can push/pull/interact with any other - but not building your own with that type of budget is assinine.