Yes we do! You can take advantage of this simple load balancing technique by either creating multiple A records for your domain or using the DNS Failover Service to perform roundrobin for you in addition to monitoring and automatically removing servers that go down. If you require more advanced load balancing, you may want to check out our Cloud Load Balancing solution which offers far more capabilities than simple DNS-based round robin load balancing.
For more information, you might find this blog post quite helpful: Round Robin DNS Load Balancing