The exact same thing can be achieved with XFN.

Look here http://gmpg.org/xfn/and/ under "Identity consolidation with the XFN rel="me" value".

Yes, the xfn solution requires multiple links to be (visible?) in a page. This is a nice way of doing what Technorati does with claiming of blogs.

It's very clever, I'd say. :) But for the regular users, xfn should be easier to pick up, though.