[ChrisClark]

It only appears to be recorded on blockchain.info. None of the other blockchain explorers seem to see it.

I'd hold off on the news until it's been confirmed.

Edit: Others have checked and can't find any of these transactions in the blockchain. Either a blockchain.info bug or hack at this point. Nothing has moved.

[0x0]

Would it be possible, just by looking at the blockchain.info website, to prove that whatever is going on is signed by someone with the private keys to these coins? If the transaction signatures validates, does it matter whether the they are accepted by the network - it would still prove "he's alive"?

[ikeboy]

It would; however in this case, the signatures do not validate, they're from a different address.