If you sign up for the Microsoft Live Club and play their free games (a few letters and you have to find words), you get rewarded with tickets. One ticket is worth 1c and can either be traded in for rewards or be donated to charity. One game gets you 20 tickets and you can play 50 or so games per day. That's $10/day per person. Once a year, Microsoft will bundle the money raised for a charity and donate it.
You can sign up at
http://club.live.comOnce logged in, click "select your preferred charity" and search for Kiva. There's more than one, make sure you select "Kiva Microfunds" (it mentions kiva.org in the description) You can set the percentage of how much to donate, in case you wish to keep some tickets for yourself. If you're really patient, you can get an xbox360, Vista Home Premium, or Office 2007 for 20k-25k :p
Of course you don't have to do much thinking yourself, here's a website to do the de-scrambling for you. You just have to enter what it finds
http://www.thewordfinder.com/scrabble.phpAnytime you enter a word combination, it executes a search for that term. Yes, Microsoft is actually paying people to use their search engine...