About twelve months ago Microsoft started the i'm initiative. By placing a special emoticon in your nickname and starting a conversation with one of your buddies, you could donate money towards a charity without ever giving away a penny yourself.
Charities like the Sierra Club, American Red Cross, the National Aids Fund, National Multiple Sclerosis Society and Susan G. Komen for the Cure benefited greatly from participating in the initiative, with close to 1.5 million US dollars raised so far. Unicef takes home the prize though, with over $255.000 being raised for the Child Survival program.
The i'm initiative isn't over however, so keep those conversations going, and be sure to put one of the following emoticons in your nickname!
*sierra - Sierra Club
*bgca - Boys and Girls Clubs of America
*9mil - ninemillion.org
*komen - Susan G. Komen for the Cure
*mssoc - National Multiple Sclerosis Society
*red+u - American Red Cross
*unicef - UNICEF
*naf - National AIDS Fund
*help - StopGlobalWarming.org
So all you need to do is put *help at the start of your nickname or *naf etc etc
More info and help can be found here : http://im.live.com/Messenger/IM/Home/