I've quoted this portion of his post (my bold) because it really nails the 'it is my Attention data' idea and how it relates to identity, something Joshua and I discussed with Dick Hardt and Kim Cameron in last week's podcast, Attention and Identity:
"Think of the world from the eyes of a blogger. You want people to come to you, not come to them. You want your stuff in your place, not all over the place. It’s not just about ego, it’s about convenience, usefulness, identity and reputation.
If I’m writing reviews, I want to have them on my blog. I don’t have the time to put my book reviews on Amazon and my movie reviews on NetFlix and my cellphone review on Eopinions and my bicycle reviews on MTB. Besides being more convenient, it also establishes an identity. Would you trust my first NetFlix review if you knew I’m a top reviewer on Amazon? But you have no way of finding that out.
Reputation goes along with identity. If I know your eBay ratings, I’m more likely to want to buy something from you over CL. But right now all that useful information gets broken down into bits and pieces, that are then scattered over the net and placed in focused mega-site, instead of being owned by whoever created them.
The more services we have out there — reviews, listings, events, social networks, forums — the more time you spend putting content in the “right place” and the less useful that content is to you, simply because it’s fragmented all over the place."