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http://netselectdomains.com

Geek Domains
Offers domain name registration services at affordable prices.
http://www.geek-domains.com/

Domain name registration services
Domain name registration and web hosting resources and information, find out where to register the cheapest domain names
http://www.domainnameswebaddress.com/

Aplus - Domain names registrtation
Domains registration, domain name privacy, transfer, multilingual domains available. Free extras, domains advanced search.
http://domains.aplus.net/

Domain Blog
A domain name weblog. Includes domain name industry news, sales reports, tips, and articles.
http://www.domain-blog.info/

Free Whois domain name search
Whois UK helps you find domain name registration information and domain name resources. All major TLDs and and UK domain name information available.
http://www.whois-uk.com

EASIserv.com Domain Name Services
Domain name registration services company based in Northampton, UK. Also offers web design and webhosting services.
http://www.easiserv.com

IDN Domains Forums
Learn and understand about international domain names. Site has punycode coverter, and a weekly updated blog.
http://www.idnforums.com/