Great post Ian. I wrote a similar series a while back trying to capture some of the challenges (http://readwriterespond.com/?p=32). Interestingly, I too have a family and public divide. I am happy being ‘open’ by default myself. However, when it involves others that may not be of an age to have a say, I usually show caution.
I like the idea of the semantic web. However, I prefer Dave White’s mapping tool (http://readwriterespond.com/?p=1185). I think that it is a more useful guide. I think that Bob Schuetz uses it quite a bit and may have some useful examples. I also know Dean Shareski uses it with his students too.
Interestingly, I used.to use About.me, but now prefer to.use my blog as a starting place.
Thanks for sharing as always.