The Digital Inspiration blog points out a feature of Box.net's free web storage service that makes sending large files through email links super-easy. If you're signed up and already have your free 1 GB of space, simply enable the Gmail or Outlook services (the latter will also work with Mozilla Thunderbird), and right-clicking on files or folders will set up a message that shares the files with any recipients. As Digital Inspiration puts it, it's similar to the RapidShare sharing method, but a lot less painful for the recipients.
Email Large Files Quickly with Gmail and Box.net [Digital Inspiration]