Domain Resources

DNJournal (the domain industry news magazine)

domainIQ (internet research tool)

DomainTools (comprehensive DNS services)

DN Prices (database of 2M+ [premium] online asset sales worth $7B+ of deals)

NameBio (database contains over 2 million domain sales over $2 billion)

History of Domain Names (history of the internet as it pertains to domain names)

howmuchisadomainnameworth (real data and real-world domain name valuation guidance for entrepreneurs)

Microsoft study on domain names (domain bias in web search)

Whoisology (domain name ownership archive)