I use YouSendIt.com
To send me LARGE files to review click here.
Enter this address in the blank window.

I also use Dropbox.com
With this you and I can share a folder with important files
like cover designs, proof questions, etc. Click on the icon to the right and setup a free account (2 GB max space). Once it is setup on your computer, create a folder (call it Thane if you like) and send me an email invitation to share the contents. Or I can create a folder and send you an invite. Either way, it is an easy way to share files.