Yahoo's Briefcase service is a far cry from the arms race of free and low-cost storage providers on the Web, but it's wonderfully simple. Yahoo gives you 30MB of file storage you can keep and store at no cost. Users can create as many folders as they'd like and dump their files in one at a time, or en masse via a Web uploader.
What makes the service particularly useful is that you set the access of each file and folder with different levels of privacy, meaning if it's time to send that 25MB folder of photos to mom and dad, you can make sure they're the only ones you're giving access to.
Winner: Yahoo Briefcase (Birefcase.Yahoo.com)