You might also check out the following Dynamic DNS providers. I
am using both of them although I might cancel the more
expensive one.
-
www.dyndns.com with an
annual fee of 50$ per domain, or
-
www.dyndns.org with an
initial activation fee (donation) of 30$ per domain and no further
annual fees. Notice that dyndns.org gives you much more
service and customization of your DNS entry. For instance, they
allow you to change your domain from foo.org to bar.org without
additional costs.
Google also points me to the following overview of dynamic DNS
providers:
http://www.thedirectory.org/diamond/teldns.htm