I've been using Diigo for quite some time now to annotate, bookmark and share webpages. Now, they are offering a new functionality with the potential to become an even more effective tool to share knowledge in a great format as the video explains.
Imagine collecting all your different web pages to research a vacation or group trip, annotate them, add voice commentary and then share them with friends or participants. Also, a travel agent could put together a collection of information and send it on in an attractive form to a client.