Diigo 4.0 new features

Today I listened to and watched a Classroom 2.0 recorded elluminate session featuring Maggie Tsai, a developer for Diigo, and teachers. Diigo (an acronym for "Digest of Internet Information, Groups and Other stuff"). Started as a social bookmarking system using tags for organization, Diigo added groups so that as you bookmark you can save to a group or classroom. Diigo also has a highlighting feature so that you can highlight and leave sticky notes on readings or assignments. Recently I used the Diigo lists feature during a presentation as you can create lists of bookmarked pages that then show as a web slideshow. There are links from the show here including the Diigo blog.