Nonprofits have been hit hard by the recession. Now many nonprofits also face the typical "donor fatigue" fundraising challenges that follow any major natural disaster such as the recent earthquakes in Haiti. All of the traditional funding streams have been hurt, and nonprofits, by and large, keep plugging along - doing more with less, to hang on till better times when they can again focus on their mission with vigor. It's hard when you are short-staffed and under-funded to consider jumping into anything new, but for nonprofits your very survival depends upon committing to building and maintaining a strong social media presence. Here's why.