I am in the process of finalizing the setup of the service that I previously mentioned. I would like to make this available to Linode users first and then open it up to the general public once I see how it performs. I need 10 beta users who can provide feedback and help to interpret some of the DNS RFC Specs. If you are interested then send an email via this link
http://www.snowprods.com/sm.php?domains/snowprods/com
By default, the following record types would be supported : SOA, NS, A, MX
I also plan to add support for PTR, LOC, TXT, and CNAME prior to general public availability.
Thus far, I have only been using SOA, NS, A, and MX for my needs. As I understand it, Linode users will never need PTR support as this is handled by Linode for us. I'm not sure how widely this kind of support would actually be needed by the general public.
I have seen several comments about needing TXT and LOC records being a nice thing to have available. I have also seen some references to CNAME entries but I'm not sure what the benefits would be compared to an A entry.
If you can provide feedback on these issues and are capable of and able to test at least one domain with several of these entries, please let me know.