You all know the problem. You want to send that large file to someone, but how? Many email systems restrict the maximum attachment size. I have to send large attachments of several hundreds of megabytes to magazines all over the world quite frequently. There are some services that you could use for this purpose.
My best experience is with http://www.yousendit.com/. They offer the possibility of sending files as large as one GB. The recipient receives an email with a URL to their file, which they can download 25 times within 7 days. Yousendit.com also holds commercial services. You can then have your company logo on the site and you will have no advertisements. You can also track the number of downloads with these paid accounts.