Free DNS service: http://hn.org/signup/virtual.shtml
Virtual DNS Mappings:
Virtual DNS Mappings is a service that allows DNS entries to be served for a domain name. This is not Dynamic DNS - but it can be used in conjunction with Dynamic DNS. In order to use this service, you should understand the basics of DNS, particularly these following types of records:
A - Address Record - Maps a Fully Qualified Domain Name (ie: yourname.com) to an IP Address (static or dynamic)
CNAME - Canonical Name Record - Aliases a FQDN to another FQDN (ie: www.yourname.com -> yourname.com)
MX - e-Mail eXchanger