Yesterday, Microsoft announced their new Search and Give initiative. Search and Give is a charitable program designed as a way for Microsoft to lure market share away from Google by making a $0.01 donation to a charity of your choice every time you use Live Search.
I’m not a development director for an NPO, but it seems like promoting this to your users is a way to get free money. I’d just be careful to make sure that search results for your organization are as good or better from Live Search when compared to Google. For that reason, (and maybe one other small one) I don’t expect to see the nice folks at google.org embracing this anytime soon.