Thank you for your feedback on this particular issue! Based on our current plans, this feature is one that will likely come as part of our upcoming V3 API. While we are actively working on developing the V3 API so that we can get it out for our developers to begin working on, I unfortunately am not able to set any expectations on when this specific feature will be available. If you're interested in updates related to our V3 API, we will be sending messages with information as it becomes available to people who are subscribed to our developer newsletter, and we will also be posting on our tech blog. You can find our blog, as well as a sign-up for the newsletter at http://techblog.constantcontact.com/
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