The comments are where the meat of the article is. You can also get some info here: http://tumblr.tomhenrich.com/post/2675663088/own-your-data.

I find Tantek's implementation fascinating but I think this is a good critique of it. I also agree with http://twitter.com/#!/glenda/status/24216200326152192 that the ideas of personal data ownership and permanence is one of the next big things to tackle.