With http://www.yousendit.com, you can send a large file to one or more recipients using ’email’. It’s not really email but that’s what it looks to the recipient…
Btw, try to avoid emailing multiple file attachments to people. Nothing bugs me more than getting an email with 10 pictures or files. There are services like docs.google.com, Dropbox, Mobileme and etc to send files.
BTW, do you back up your PC? Can you survive if it got stolen tonight? My guess is you will answer no.
BACKUP your data on a SEPARATE, EXTERNAL HD. You’ve been warned.