Usually when someone volunteers, they do so WITHOUT the expectation of receiving something in return. At least, that is how I approach it.
But if I were to volunteer for this position, the benefits I would derive would be: 1- broadening my horizons, the main benefit of searching for information; 2- learning how to use blog software, and knowledge gained is always a plus; 3- sharpening my writing skills; 4- being a more integral part of a community that is a major part of my life.
I'm sure other folks could add to the above list. Benefits of volunteering are in the eye of the volunteer.
The tragedy of life doesn't lie in not reaching your goal. The tragedy lies in having no goal to reach.