I for one don't like the new name. BrowserID was a perfect name - just an ID that you can use with browsers. It doesn't require any personal data, so it has nothing to do with social sites or real identity. The interface by default allows you to have multiple browser-ids which by itself contradicts the idea of "personhood". This name may raise concerns about "persona-l" data
TL;DR: this is just a name change.<p>Thoughts running through my head: I had better not use this for anything important for the first couple of years, until the codebase grows a reputation. On the other hand, this looks great for all sorts of low-security sites where they just want another freaking login. And then -- is the identity token consistent across sites? I don't trust site A not to compare things with Site B. Time to look into the code.
BrowserID is pretty cool in my opinion. It gives identity providers a lot of flexibility in how they can confirm users identity including multi factor auth or physical tokens.