Brave New Software and the University of Washington created uProxy as a way to enable people living under censorship a way to find their content. The idea was seeded by Google Ideas, a think-tank meant to help people use technology to confront repression. UProxy is exactly the sort of tool Google Ideas had in mind.
Some people live in countries that actively censor their access to online content or monitor their communications. The NSA spying scandal may make even Americans feel the need for enhanced privacy. Even if you feel safe from government spying, using the Internet while you're traveling or in an Internet cafe isn't without risks. If your connection isn't encrypted, it's possible for others in the same location to snoop on your communications. Most infamously, even Google snooped on private communications through public Wi-Fi.
Right now (October 2013) uProxy is in limited release. However, once it is more widely available, it will be a tool that allows friends to create VPN (virtual private networks) for each other. Both users have to trust each other. Hosts need to have secure and encrypted access. Users need to not betray the trust of their friend by doing something illegal or unethical with their VPN connection.
UProxy is not a torrent or file sharing network.