Have you ever wanted to chat with other folks looking at the same web page you are? Now you can.
Chatsum is a Firefox extension that lets you chat and leave messages on any website for other Chatsum users to see and interact with.
The Chatsum sidebar houses a fully-fledged chatroom, specific to the page you’re looking at, and all the other users in the room are also viewing the same web page. When you navigate to a different page the Chatsum room changes automagically. If you open a page in a new tab, Chatsum will keep pace with whatever you’re viewing. There is the option to switch between a page level room and a site level room, and you can also see what rooms/pages are popular with other Chatsum users.
I haven’t installed it yet, but I will be. I wonder what kind of dynamic this could bring to Gadgetopia? Even better, what could it bring to sites that don’t have a comment section?