Those of you who have PCs and/or run Windows should check this out:
Basically, if you add a little code in front of your user name (such as *hsus) on Microsoft Messenger, then every time you have a conversation, send a message online, or just spend time chatting, Microsoft makes a donation to the organization you have chosen, as represented by that code you chose. There are 10 different orgs currently represented, and they include Susan G. Komen for the Cure, the Humane Society, the Red Cross, and the National AIDS Fund.
It's a donation to a good cause for something you're already doing! All you have to do is have that little code attached to the front of your user name, declaring your allegiance.