Apologies for getting into this thread a little late! Just writin' to thank Bliss for directing people toward FreeRice, whose intentions seem to be honest -- heck, even Snopes.com discusses it! -- and to encourage everybody here at Elliquiy to check it out.
By the way, FreeRice has recently increased the amount of rice donated for a correct response from ten grains to twenty grains! Not a huge amount, granted, but it adds up. Visit the "Options" page and arrange it so that you can watch your donations accumulate over time!
Thanks again for mentioning it, Bliss. And thanks, Sabbat, Ophelia, Vekseid, and moondazed, for supporting it. Here's to generosity and here's to knowledge!