Data Portability - what a headache.

Here's an interesting post by Robert Scoble (he who needs no introduction) on the issue of data portability.

We've talked about this subject a couple of times in my Web Strategy group, (Dennis has posted lots about it here) and it's a really thorny issue. You want to be able to sign in ONCE, to all of your networks, or update something once and have it update everywhere, but you also want to keep some things private, and protect yourself from spam. OpenID (or yahoo version here) is a start but I suspect they haven't really worked a lot of these issues out yet. This is definitely something to keep an eye on.