I don't see the blog thing.....a leaked story to the press, a couple of "sightings" ala Elvis, and let the story build that way. I would think that the Andy way would be to show up where he was least expected, when he was least expected, and walk in like the last 20 years had never happened.
Check out the web site that Yahoo linked to in regards to this story.
http://www.prweb.com/
Does not make this story seem too credible.