I don't think you really need to worry about Path being acquihired. Given the people involved, and the fact that they already turned down a reported 100 million acquihire offer from Google, I don't really expect Path to go that route.
For your question about a place to store all of your data, check out: http://lockerproject.org/. While it doesn't support Path yet (they don't have a public API) it certainly will when Path makes their API available.