Woohoo! I successfully switched the domain name from cyrozap.blogdns.com (DynDNS) to cyrozap.com! I got a really good deal with 1and1.com ($8.99/year or something like that with the first year free—that's $.25 per month), and if you click on an individual post, you'll see that below the "Submit" button for comments, I switched the ad from Amazon to 1and1.com's affiliate program ad.

Well, now I can have subdomains, like store.cyrozap.com!

I also got the DynDNS name to redirect to the new domain name, so all the old links work.