It would be funny if they made a few more subtle changes, like a search/replace HN for riddlr. Then the top story would be "Ask Riddlr: What is Riddlr?"
Or even do it both ways. "Ask Riddlr: What is HN?". It would be like some weird parallel universe.
I'd guess some guys custom HN Mod, so he can easily see what he has read and what not. Maybe it has more features for him when he's logged in, like saving etc. Also it's pink.
Whats wrong with browser history?
Syncing between machines (including phones).
I regularly read HN on three different computers; on my work desktop, on my home desktop and on my Android phone. These devices do not share browser history unfortunately.
Oh that. That's just Fred.
"Sorry. It appears that hacker news is blocking our server's IP. ridddlr news is down until further notice.
Thank you for your patience."
Ha!
Maybe its for having it indexed by search engines. (I think HN disallows indexing of their site.)