If you like to chat and also enjoy helping others there is a great option for you. And it will not cost you a cent. For every conversation you start by using Windows Live Messenger there is a certain amount of money donated to your preferred charity organization - e.g. I've chosen the UNICEF. In order to contribute to our society this way you just have to add a special logo "I´M" in front of your name. There has been almost $150,000 raised so far.
You might also consider to star in a new MTV project that is starting now in order to promote this cause.
Windows Live Messenger has over 220 million contacts worldwide. It is popular for the wide range of services it offers. Apart from the traditional text, phone and video conversations users can play games (e.g. chess), chat with special agents like Encarta and share their photos and other files. All this is for free - as well as other Windows Live services.