is there a way to manage DNS without being a sysadmin?

What are pros and cons of using wildcard DNS to manage hostnames in   SaaS , multi-tenancy and cloud computing  if you want to  give  customers URLs like 'yourcompany.mysaas.com'  ? For example, Amazon S3  uses   wildcard DNS, Salesforce does not.

• I want to  understand the best approach to  provisioning new  customers for a SaaS system. Do  corporate clients want a URL  like 'theircorporation.mysaas.com' or  are they just as happy with http://mysaas.com/theircorporation. DNS Wildcards seem like the way to go  but if so, why don't people like salesforce  use them ?

• Answer:

  A third-level domain is not necessarily a wildcard. Wildcards resolve anything to a particular destination, and appear in the form *http://.yourdomain.com. They operate as a catch-all record for the parent. http://Corporation.mysaas.com is probably a subdomain, not a wildcard. Wildcards might be an interesting solution for something specific, but you'd probably be better off using subdomains in most traditional circumstances. Miscreants might enjoy the fact that http://yourmomisugly.mysaas.com (or far worse) resolves to a responding address.