If you've been lucky enough to snag yourself a Gmail account, Google's (sorta) new 1 gigabyte web-based email (still invite-only), there are tons of tricks and hacks for using your new Internet hard drive.
One of our favorites is the GMail drive extension, a little Windows app that lets you access your Gmail gig in Windows Explorer, as if it were just another hard drive on your computer. Drag and drop big or small files to your Gmail drive, and access them from any computer connected to the web via the Gmail email interface. Think movies, pictures and music. (Note: Don't store any extremely personal or sensitive information on your Gmail drive via this extension, as the file transfer is insecure, and the tool is experimental.)