For #1, there are checksums now, but the more interesting question and challenge is how would a decentralized registry/DNS be designed, that has reasonable anti-incentives for squatters?
Both editions of the book were before the invention of blockchains. Integrating it in the next edition of the book would be solid work: not just explaining a blockchain but really integrating it with existing parts of computer science.
Why? Interested in your reasons. One plausible one is that trusting an author you know can be more practical than examining every line of a massive open source code base. Could that be a reason? Others?
It's not clear what parts the author modified last month, since the bulk of the article is from the past. A separate, additional article would be interesting to hear author's recent views and experiences.
For something upcoming, http://www.augur.net is an attempt at a decentralized prediction market.
Note: since you wrote it twice incorrectly, the word is spelled 'duplicate'. 'Dublicate' could be an interesting word since it resembles double, but it doesn't exist yet.
Ray Ozzie had a #1 comment here recently and I wouldn't be surprised if BillG also reads HN. He's a voracious reader and it would be interesting to see what online sites he reads daily.
Late commenting here, but smart contracts haven't been mentioned and they are better than existing contracts because they enforce themselves. Here's an article that explains well and also links to Szabo's original.
At this point in time, it is probably more for Carlsen to lose than to Caruana winning. If Carlsen feels good, he will train a lot; hopefully it will be an exciting match.
His quote was "tend to be lazy". When he feels good he trains a lot. No amount of brilliant talent, that is lazy, is sufficient to be world champion in any endeavor. There's too much competition from the others who want to be champion.
https://bitcoin.stackexchange.com
https://ethereum.stackexchange.com