What if n'guild wants to resell domain names ?

Software solutions

• http://open.gandi.net
  is a set of two perl tools to manage EPP as well as RRP, for linking to VSGRS, PIR, Afilias, Neulevel and GNR

Providers and solutions

• VSGRS is Verisign and manages lotta country tld as well as generic ones.
  become registrar for ccTld http://www.verisign.com/products-services/naming-and-directory-services/naming-services/cctlds/page_001091.html
  tech solutions for ccTld http://www.verisign.com/products-services/naming-and-directory-services/naming-services/cctlds/page_001092.html
  become registrar for .com and .net

http://www.verisign.com/products-services/naming-and-directory-services/naming-services/com-net-registry/index.html

• PIR is Public interest Registry and manages .org
  become a registrar http://www.pir.org/registrars/become_a_registrar/
  tech details http://www.pir.org/registrars/become_a_registrar/step2

• Afilias manages the .info
  become a registrar http://www.afilias.info/registrars/become_a_registrar/index_html
  very similar to pir

• Neulevel manages .biz tld
  become a registrar http://www.neulevel.biz/partners/become_registrar.html

• GNR manages .name
  http://gnr.name

see also Registrar Howto for details on solutions above plus .no domain
Note : all the above solutions require an ICANN registration that requires to have 70 000$ funds in bank. It's not an immediate plan, then.

• .coop dotCoop http://www.nic.coop/ is reserved for cooperatives
  become a registrar http://www.nic.coop/registrar.asp
  cost $1000 setup, 2-year min, $64 per name per 2 years; sold $198 by http://domain.coop, exactly same price on http://domainregistry.de, 170 euros on http://coop.tuonome.it/