Any other issues besides the mail? I don't really plan to use the domain for email accounts.

My current thought is to register a domain with a CNAME record (via interNIC's directDNS for $5/year), pointing to my current dynDNS account. Although, looking at namecheap.com (which Rob recommended in another thread), they give you all that functionality for free when registering a domain.

So I guess now it boils down to... do I want to have continued payments of $10/month... hmm...