Currently "... At most one EC2 cloud can be defined per region, as the region serves as the identifier for the cloud.". This restriction prevents one from defining multiple slaves spread across EC2 accounts, such as development and production for example, when both accounts are deploying instances in the same region.

The API key is what identifies the cloud account on the EC2 side, so I'm curious why this restriction exists and am hopeful it can be removed? Thanks!