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Following Ben's itheme there's a new initiative set up by Microsoft to give money to charity and it doesn't cost you a penny...

You can find more information here but all you need to do is type a code into your display name in MSN to chose the charity you want to support. You'll see a little logo appear next to your name and Microsoft will donate a percentage of the revenue they get from advertising to your chosen charity. You can also set up a signature in your Hotmail account to do the same thing.

Keep your eyes open for the launch in the UK as it's currently only running in the US.