New technologies always fascinates me. My ISP was recently having problems with its email server where it was stripping very large file attachments from my sent emails!
I was then told about YouSendIt, this is a site where you can send your files to its FTP server which then sends an email message to the distant party for them to then download the file(s). Basic functions are free to use, but more is offered if you sign up for an account.
Although my ISP is now back in full operation, I will keep this as it saves me having to set-up an FTP server which I would not use very often.
Another good example of Web-Services or Software as a Service (SaaS) as these type of sites are now becoming known.
Beasley's Place 