Ubuntu Gnome Shell Remix is a flavor of Ubuntu that utilizes the new Gnome Shell in place of Unity. This live USB image can be written to a USB drive or flash media such as an SD card for installing or previewing Ubuntu GSR. For Windows users a tool such as Win32 Disk Imager (https://launchpad.net/win32-image-writer) or USB Image Tool (http://www.alexpage.de/usb-image-tool/download/) can be used to write the image to media.
Ubuntu Gnome Shell Remix (http://ubuntu-gs-remix.sourceforge.net)