*Update
www.wetransfer.com is a much easier way to send large files. Its direct, and no need to register.
Also a very handy tool is dropbox. With this you can send large files links when dropping files in your public folder. And if you have a smartphone, Control it with the phone. It also syncs between PC or MAC. Its very handy to quickly drop many mp3 files in your dropbox. Then you can listen to it on the road, without needing iTunes. The same accounts for pictures, docs or pdfs.