I know some folks who have obtained a GMAIL email account. After a few weeks and months, it was still at 1-6% or so usage out of the total 1000Mb. Now there is a great way to use that extra space. I am talking about GMAIL drive shell extension.
Go to http://www.viksoe.dk/code/gmail.htm to download software, what is required and quick explanation about GMAIL's drive shell extension.