We are now offering Shared Cluster plans in the AWS Oregon region. You can visit the MongoLab create page if you would like to provision the plan.
Shared Cluster plans are configured with two data-bearing nodes and an arbiter. These plans are hosted on shared multi-tenanted resources but are also suitable for "production use". If you have questions about our different plans, we have helpful documentation on each plan type. For additional help, you can also email us at firstname.lastname@example.org.