Google is set to expand its free e-mail service. It will be doubling the capacity of its GMail, allowing users the option to use up to two gigabytes of e-mail storage. Now that really is something, if you consider that we had hard drives of that kind of size only a few years back.

The upgrade comes one year after Mountain View-based Google introduced the service, prompting rivals Yahoo and Microsoft to boost the capacity of their own free Web mail services.