Hi Trevor --
At the moment, the Web-Application is the Full-Featured version of Producteev. We're currently evaluating what it would take to upgrade the Mac App to a full feature set, but, we have no timeline for that implementation. The web application has a much shorter development/deploy cycle, which is why it's rapidly outpacing the Mac App in terms of available functionality. It's in the planning stage and on our radar, but, at the moment, we suggest using the WebApp for the full experience.
Let me know how I can make your stay more enjoyable.