Blogger Nauman Leghari has put together a tool for sending automatic file backups to Gmail.
GmailSync is an automated backup tool to synchronize files on your computer to your gmail online storage. By using this, you can theoretically use almost unlimited amount of free space available on your gmail account.
How It Works? GmailSync is [...]

This is a Firefox extension that allows you to manage multiple gmail accounts and receive new mail notifications. Displays account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets. Features

Manage multiple Gmail accounts
Receive new mail notifications
Tooltip with account details including new mail snippets
One-click access [...]

Web 2.0 pundit Richard McManus offers up the best Web-based office solutions of 2006. Leading the pack as far as e-mail goes is GMail.
There are various companies offering hosted email for businesses - Webmail.us and Sproutit.com are two that spring to mind. But for me, the clear innovator and leader in the web email department [...]