framebench.com does this for video, PDF and images.. syncs pan and zoom position as well. In private beta, collecting some great feedback for now :) Great to s

framebench.com does this for video, PDF and images.. syncs pan and zoom position as well. In private beta, collecting some great feedback for now :) Great to see people building apps which leverage the power of sockets and enable real time interactions on the web. A trend which is much likely to catch fire soon. (yes, I work with Framebench!)