Google Grants

http://www.google.com/grants
Google allows qualified nonprofits to use Google Adwords for free.

Organization can use the Google Adwords to drive more traffic to their web sites and therefore raise awareness of their cause and solicit online donations. Google Adwords are the small text ads on the right site of their search results pages.
Google quotes that example organization have increased their donation revenue by 43% or another organization increased their volunteer base by 60% to 70%.

Even if the potential for increased donation might not as big for area non-profits, it still would be worth the effort, as you set it up one time, and then monitor it so you can tweak it to your needs.

To take advantage of this offer, apply for the Google Grant at http://www.google.com/grants through Google's easy online application. Please spend some time reviewing the site to learn more about the program, eligibility, grant details, etc. Google also plans to partner on education initiatives for the nonprofit community, and will be developing these efforts over the next several months.