Joining a community not only makes you feel better but can land you a great job. Janet Swisher has been contributing to the online community FLOSS Manuals writing documentation for free/libre software. In a message to the community she wrote:
I hadn’t been looking for a new job, but I was contacted by someone at Mozilla about a position they had open. […]
I think it’s fair to say that being involved in FLOSS Manuals helped me get a job at Mozilla.
I’ve seen this happening often at Funambol where many of the people active in the community have been hired. Whether you’re actively looking for a job or not, its a good investment for your future to make your passion visible.