Righthaven is the copyright trolling outfit created by the Las Vegas Review Journal to blackmail alleged newspaper copyright infringers with baseless threats of domain seizure and huge cash judgements. When they created righthaven.com as a home for information related to their indiscriminate bulk-litigation campaign, they neglected to supply the registration information required of them, and it appears that they declined to provide the info when requested to do so by their registrar, GoDaddy. So GoDaddy's taken away their domain:

Now it appears that GoDaddy, the domain registrar for the domain Righthaven.com, has taken down their domain for an invalid whois. According to ICANN rules domain owners are required to maintain valid whois information. Anyone can report an invalid whois record via the WDPRS system, which then passes on the complaint to the sponsoring registrar of the domain. The registrar would then attempt to contact the domain owner and ask them to verify/update their contact information. Should they not do so, the domain can be suspended or even deleted.

RightHaven.com Taken Down for Invalid Whois

(Thanks, Clifton!)