Google Apps

Google what now? Google Apps is the commercial version of Gmail, allowing you to host your own domain's email through Google. 

"Google Apps ... makes it easy for your club, family, sports team or group to communicate and collaborate online -- and it's free."

The Standard edition (Free) of Google Apps allows you to host up to 50 e-mail addresses, and store up to 7 GB of data per address.  That's a lot! Synchronization with your favourite e-mail client and mobile phones make sure you're always up to date on the go.  Calendar sharing -- with email, popup and SMS reminders -- and document sharing provide the ultimate tools for group collaboration. 

Google Apps Premium provides up to 25GB per user, a 99.9% uptime guaranteed SLA with 24/7 support, and access to Google Video and Google Groups.