A few ideas:
Community members should be able to help improve the Open edX website. Adding case studies is the first item that comes to my mind.
Maybe have community brainstorming sessions/documents/thread about how to improve the website?
Community members could also collaborate with Open edX on blog posts to increase online and social media presence.
An Open edX white paper would be a useful tool to have. I’m thinking of something that correctly describes the product, explaining what it does and doesn’t do well (in which case contributions can be made).
It would be also useful to know how the edX organization want to market Open edX - what has the strategy been up until now, and what’s coming for the future?
I’ll try to post more ideas as this discussion evolves.