DropLoad

DropLoad is a service that allows you to send files of up to 100 MB to anyone with any email address.
 
From their site:

What is Dropload?
Dropload is 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

An alternative to using this service is to send attachments using the Free JRSplit software.  See my article on JRSplit.
 
I have also written an article about other Email Services.