I agree, the www subdomain looks awkward and unwieldy. They should make hackerne.ws the canonical name. Though they'll have to be sure to set their geographic target to the US in Google Webmaster Tools, unless Y Combinator has moved to Western Samoa? ;-)
did not know that. wonder what purpose it serves. "The .ws domain is an abbreviation for "Western Samoa", the nation's official name when two-letter country codes were standardized in the 1970s" -wik.
I believe a forum member purchased and redirected it as "a gift to the Hacker News community" and was immediately flamed for the inherent security issues.