Opera’s newest release revealed Opera Unite which is an unique technology allowing the web users to share data from the browser. This Opera unite increases the web experience by allowing people to share content, listen songs and transfer pictures directly from the browser. You can find hosted contents of your friend as well as search your friends from the opera unite interface.
Here is the video from the official Opera blog and here is the video to get you started!
Opera Unite will also be supporting mobile devices (integrated to Opera mini) in the future. For PC Opera unite, there are services (like addons, opera plugins) available for Opera Unite which lets you transform your opera browser into media player, web server, note making and photo sharing application making it an powerful browser.
Moreover, many developers are looking forward to create there own application and sharing them with the community, helping spread the services available for Opera unite.