Though I can't provide specific details on most projects I worked on at Airbnb, here are a few examples:
An experiential campaign in partnership with Virgin America to promote the launch of direct SFO - Honolulu flights and Hawaii Airbnb vacation rentals as well as a points-based promotional campaign to encourage Virgin fliers to sign up as hosts.
A strategy for host-to-host recruitment as well as a roadmap to adjust the brand so that it resonates better with Airbnb hosts in addition to travelers.
A project promoting the vast knowledge base of SF hosts through a partnership with SF travel and physical guidebook as well as events, highlighting Airbnb's role in the local SF economy and community.
Persona-maps of groups/subcultures well suited for hosting to identify opportunities for future campaigns.