Glass is a service that works in your Browser and allows people to have conversations directly on any website. Its pretty cool and a great way to share websites as you can see in the video. The only downside is that only people who join the service can see you’re posts or if you share the post on your social networks. They just came out with an iPad and iPhone App. I like it and will probably use it more now that its on iPad. Its almost a replacement of Instapaper. Almost.
To sign up for Glass goto: https://www.writeonglass.com