I host a ccTLD domain with Godaddy's Off-site DNS. I'm amazed by the fact that it's completely free even for domains not purchased from Godaddy, in compare to other DNS hosting services like DynDNS or Nettica. They limit 40 records per domain but i don't think you'll use more than that. The service fits perfectly if you have a domain portfolio with low traffic.
Disclaimer: I don't know/care about support since my site is non-critical but Godaddy promises premium service coming soon. My site is running smoothly serving 10+ mil. pageviews per month. Time using Godaddy's DNS until now: 3 months
http://help.godaddy.com/article/4041
Disclaimer: I don't know/care about support since my site is non-critical but Godaddy promises premium service coming soon. My site is running smoothly serving 10+ mil. pageviews per month. Time using Godaddy's DNS until now: 3 months