Collin:
We're looking at the next resources that would be ideal for the API, with the eventual goal of getting all resources into the API. The Community has been weighing in heavily on this and so far the top contenders are: Giving, Groups 2.0, and Activities. We'll add your vote to Activities.
We will be launching forums on http://developer.fellowshipone.com soon, so you'll also be able communicate with other churches, 3rd parties, and developers about your ideas - hopefully together we will be able to deliver resources in the API that are practical and timely.