Does anyone know a good way to provide domain name registration to potential clients integrated with lets say my website?

I know about Wild West Domains and they have a low end option for $99 per year and higher end options for more.

They even have an API which would allow me to integrate this into my XOOPS site so I can private label it and offer domain name registrations and then let them continue on with the rest of the service options.

Is there a better option out there? any help would be appreciated.

Best Regards,

anyone? Bueller?