I have secondary dyndns service renewal coming up... prices also raised to $25 per year per domain. Screw that.
I can get 10 domains with 100% SLA and 5 NS servers multi-geographically located for $29.95/year
So, I switched to DNS Made Easy (www.dnsmadeeasy.com)
The only machine that still thinks its authoritative is my machine in Troy, Michigan.
Soon... once DNS stabilizes for a few days, its off to Google Apps/Mail/Sites for everything else for $50/user/year (2-3 users)
Then, no more $50/month and I get to sell my server.