Campaigns are on the roadmap. All the required code to support them is complete, we just need to build the scenarios.
Tell us what your needing, coding and otherwise. Congrats on the great work so far also!
In terms of where we most need contributors, at the moment I'm not aware of anyone working on campaign storyboarding or UI mockups.
[1] http://trac.wildfiregames.com/wiki/GettingStartedProgrammers [2] http://wildfiregames.com/forum/
If you're a programmer, you can start here - http://trac.wildfiregames.com/wiki/GettingStartedProgrammers