i've bene using the afraid.org free dns hosting for the past few months, and i've gotta say they offer very good service.
They're system makes it very easy for newbies to learn their way around dns, and they offer a great service.
They offer 2 types of dns hosting: Public dns hosting, which allows all users who are registered with afraid.org to create their own dns records on your domain; and they offer a private dns hosting system where you are able to manage your domain's dns records, without allowing other users to manage their dns.
Plus, on each domain you host there, they don't restrict the number of dns records you are allowed to host there.
If any of you are looking for easy to manage free dns hosting, i recommend afraid.org.
Also a very handy option if you need to host domains that need nameservers in different class c networks like .de and you only have servers in one DC, use their DNS, setup some A records and away you go