Even the people I email everyday aren’t in my gmail address book, they’re in OS X’s Address Book. I’d love a way to select them all, click export, and upload that file to various networks, and give me the option to add those friends (like they currently do with gmail contacts). That’d be nice if more sites adopted that.

Interesting. I like where you’re going.

The fact that data sent from/to that one place passes through / ends up in other platforms like Facebook/MySpace/Twitter etc. is irrelevant in some ways. I can always go and check it there if I happen to like a particular format or way of presenting it, but I want to have a single place (I use the word “place” – I guess site or even service or application would work too) to manage it all from. Then it’s less about data portability (since my data never moves – at least its home doesn’t) and more about APIs that allow me to plug my data in / feed data out of other services as needed. I think whoever figures out how to do all that will make a lot of money, and destroy advertising revenue streams on the social networking sites in the process. (just think what offline messaging has done to that aspect of Facebook’s site traffic).