If you know anyone who runs Internet services, specifically their own domain name servers, please inform them of this vulnerability:
http://www.us-cert.gov/current/index.ht ... e_to_cache
The vulnerability is specific to the manner in which DNS is implemented, not a particular implementation or service.
(Note: This only affects caching resolvers. Servers simply providing DNS access for web services will be vulnerable but not affected since they don't provide cached results.)