I've just come across Dropload, which may be of use / interest.
It's "a place for you to drop your files off and have them picked up by someone else at a later time. Recipients you specify are sent an email with instructions on how to download the file. Files are removed from the system after 7 days, regardless if they have been picked up or not. You can upload any type of file, mp3, movies, docs, pdfs, up to 100MB each! Recipients can be anyone with an email address."
It seems it's being used especially by media companies to share large files with people, and is certainly more convenient than email and nobody has to know much abouut technology to be able to use the site.