As it is defined now, this project doesn't have task management with its scope. At least not now. The focus is in attracting new contributors and allowing more effective notifications and connections between old and new contributors. This is complex and disruptive enough, and I prefer to leave the rest for later, or for a separate project.
Once a project, a contributor and an optional mentor get connected through a task we need to a way to follow up, complete and evaluate the task. Different teams are using different tools for this. As said, it is another complicated beast. We discussed a bit of this recently at Volunteer_coordination_and_outreach/Openhatch_2013-02-27.