Do you work for a DNS provider or CDN or something (so as to see this in near realtime)? Envy.
I haven't seen a lot of people using both EC2 and Terremark for the same app -- kind of different markets. Not technically unreasonable, but Terremark seems to be more enterprise IT outsourcing, and EC2 (followed at very far remove by the other clouds, including Rackspace) being Internet-delivered consumer, etc. apps, or at least larger scale public services.
I haven't seen a lot of people using both EC2 and Terremark for the same app -- kind of different markets. Not technically unreasonable, but Terremark seems to be more enterprise IT outsourcing, and EC2 (followed at very far remove by the other clouds, including Rackspace) being Internet-delivered consumer, etc. apps, or at least larger scale public services.