Recently I've seen drop.io mentioned several times in blogs and other places. The other day at work, I had to send two large files to a vendor. This vendor's email service seems to choke on files much larger than 10mb. In the past I've used YouSendIt, BoxDotNet and SkyDrive to allow them to pick up my files. This time I used drop.io. I was very pleased with the security of the service and the vendor did not raise any questions about it because I had it password protected. That's a service I'd expect to register or pay for but drop.io offers it for free and no registration is needed.
Quote from the website
Drop.io is the simplest way to share files online.
Simply set up a private space to drop any files by phone, email, web, widget or fax and then share them with whoever you want via a variety of outputs.
