Sort of responding to you and Nick Lothian (nl) at the same time, but that's the main difference I see between something like this and webfinger, is the ease of updating.
Further, I see a distinction between Personable (the site) and the "Personal API", is that I see Personable as also having services that actively monitor other social sites and update Personable automatically. Checkins to Foursquare, Facebook, etc could be automatically read in to Personable, which would show your 'current location' as whichever the most current update is, regardless of which provider you used.
Same thing with RSS feeds, Youtube videos, etc., etc.
Perhaps not much of a distinction, but that's my thought process anyway.
Further, I see a distinction between Personable (the site) and the "Personal API", is that I see Personable as also having services that actively monitor other social sites and update Personable automatically. Checkins to Foursquare, Facebook, etc could be automatically read in to Personable, which would show your 'current location' as whichever the most current update is, regardless of which provider you used.
Same thing with RSS feeds, Youtube videos, etc., etc.
Perhaps not much of a distinction, but that's my thought process anyway.