I was thinking again about owning your data and really it comes down to the fact that I see no real value in the data that I'm putting in to Twitter/Facebook. Yes the relationships matter, but not the data.
Data I Care About
I am an avid cyclist, so avid that I record my sleep and resting heart rate every morning. I record every workout and many months of the year I even record what I eat. That data has long term value to me. I want to know how many km's I put on my bike last year and last month.
Currently I'm putting that data in to a bunch of different spots (Strava, Garmin Connect, Training Peaks, and the Garmin Desktop Software). Since I put it in the Garmin Desktop software I have a local copy of all my workout files, but I don't have a copy of my resting heart rate and sleep information, nor do I have a copy of what I eat.
So this is data that I do care about, and I need to come up with a plan to own it properly. Maybe I'll build a WordPress plugin to record it all, then a fancy UI and reporting.