I just started with Crowdtap.com. Basically its a market research site that allows you to earn money for the charity of your choice and for yourself. I just signed up to get a free pair of jeans from Old Navy for me and a friend!
From their website:
"When you have more than $9.99 in cash available, you can redeem your earnings. 5% will automatically go to the charity you selected which Crowdtap will match. You can choose to donate the rest for your charity or get an Amazon gift card e-mailed to you."
You can also join discussions, sample product and host Parties. I haven't been a member long enough to enjoy these benefits but I will definitely be keeping everyone updated. It sounds pretty cool and I have already reached level 3 (almost level 4)
other companies you could be helping out are: Playtex, MSN, Pepperidge Farm, AOL, and Bing. Just to name a few. Definitely worth checking out!