Just discovered a new educational web based corrolation tool called 'Learnist'. It's still in beta at the moment, with limited abilities to create your own stuff, but you can join and poke around the site - although you have to log on via Facebook, which is irritating to say the least.
The idea behind Learnist is to create learning boards by dragging in content from different places, such as websites or YouTube videos, write a brief description on what people are seeing and allow them to comment, ask questions and so on. It looks reasonably straightfoward and easy to do, and would be a great educational tool to get a class to create their own boards of content .
I wasn't able to create my own boards, but as I say, that's being rolled out. I found the concept very similar to Meograph which I've recently blogged about. It's certainly a step on from tools such as Squidoo, Museumbox and LiveBinders, and will appeal to trainers, educators, teacher librarians and children. The main issue that I see with it is this integration with Facebook, which is irritating and unnecessary; particularly if you want to use it with children in a school - it'll be near impossible.