On this site we spend a lot of time showing people how to save money. Now we are turning our attention to good stewardship of your money. Hey, if you’re thoughtful enough to donate your hard earned money to the needy, you should expect that most of it goes to the target of the charity.
A quick way to sort through which charities meet your giving criteria, take a look at Forbe’s report on the 200 largest charities by clicking here. http://www.forbes.com/lists/2008/14/charities08_The-200-Largest-U.S.-Charities_CharComm.html
Remember, that you can click on the column header links to sort by what is important to you.
FREE Giving?
Yep, you can donate to your charities just by using goodsearch.com . You just specify your charity, use their search engine (just as you would Google) and your charity receives money from goodsearch.com.
Another option accomplish a similar result to feed the hungry is the thehungersite.com . When you click on sponsor links food is donated to the hungry.

There are other places with good information on charities. Unlike the Forbes one listed, some of them make it their business to evaluate effectiveness and efficiency of charitable organizations: http://www.charitynavigator.org/ and http://www.guidestar.org/. I like charitynavigator.org better because its information is more up-front.