It'd be cool to add the ability for users to backup their data on http://planhack.com. I figure that with the demise of ma.gnolia.com people would demand this option. Looking around at other sites, it seems like they haven't implemented data sharing, beyond maybe an RSS feed.
Currently, exposing two icalendars ( public and private ) with vjournals seems the way to go. The private icalendar could include the goals, or maybe just add a separate text download. Do better ways exist?
After reading the wired diamond heist, I idly dreamt of resistance hackers planning data liberation by:
"One reason you should not use web applications to do your computing is that you lose control. It's just as bad as using a proprietary program. Do your own computing on your own computer with your copy of a freedom-respecting program. If you use a proprietary program or somebody else's web server, you're defenceless."