Thanks to Erik I have discovered an interesting web annotation feature called Glass. At the moment they are in beta and you have to get an invitation code to get an account, but they aren’t that hard to get.
Glass lets you add glass slides to web pages that you can invite other Glass users to see. These slides can hold conversations about a web site. You could use it to discuss an interface with a graphic designer. There might be educational uses too.
The interface of Glass is clean and it seems to nicely meet a need. Now … can we make a game with it? Can we do with it what PMOG (now called the Nethernet) was doing?