Currently, the users must have the app to run the tasks. We don't currently have a way to embed the task UI. I worry that if we whitelabel it we won't see network effects.
For what it's worth, people coming in to do the photohunt app are doing other people's tasks, too.
We want to start with getting people to use the mobile apps. We are looking at other targets in the future (browsers already work. televisions? cars?)
The scavenger hunt is an app with a single task. Apps are really a developer notion - users don't see apps in the UI currently, only tasks.
This may change in the future; inside the one task are several subtasks: suggest a hunt, rate a photo, take a photo. and the "take a photo" part lets you mark a hunt as inappropriate.
In the future these could be four or five simple tasks once you have accepted the larger "task."