This is exactly why I'm contributing to the Locker Project. I personally have data on tribe.net I'm concerned about losing.
I could write a scraper myself, but I know a ton of people who feel the same way. These are people who aren't programmers but would personal copies of the digital snowflakes they've created on that site. It's far more useful to build a Locker connector that anyone can use to sync their contacts, messages, photos, etc.
We hope to help solve at least the backup component of this at: http://lockerproject.org/. This just helps reinforce, in our eyes, that we need to push hard to get this in front of people as soon as possible.