Thanks for this thread, everyone. I'll be looking into acrobat.com.
I've used yousendit.com, and others like mailbigfile.com, in the past, but as far as I can tell they're only useful for single files (albeit very large ones). Of course, I can zip a bunch of files into a single zip file, but does anyone know of an alternative that allows multiple file transfer? An online FTP server is what I'm getting at, I guess. And I need it to work both ways - ie people need to be able to send multiple files to me, and I need to be able to edit them and send them back.
Is this acrobat.com service what I'm looking for?