Rob, how about creating Subdomains on biblepay.org and you set it to ips of stable servers. This way, if a server goes away, you only need to change the dns, but not the client.
Like:
node.biblepay.org
node2.biblepay.org
node3.biblepay.org
node4.biblepay.org
node5.biblepay.org
...
Nice idea, but still points to centralization. If the biblepay.org domain gets hijacked everyone is stuck.
The probability of that may be low, but better safe than sorry.