This article mentions some of the benefits of using Diigo, and in the comments section, there is some discussion of importing bookmarks, with tags, from Delicious, for those interested in trying that out.
Recently learned about this new web-based tool and have tried out the feature which makes it very easy to send a video message by email. I am also interested to test out the chat feature, which would allow a group of people to hold a videochat (up to 20, according to the website), to see how well this works. If it works well, it could be used in many ways, to support meetings and collaborative work.
Librarians are often a great source for information. Here are websites they recommend for kids, on various topics. (I enjoy reading content for children sometimes, to help me better understand certain concepts in science, etc. as it is understandable and often simpler/quicker and in a form that makes it easier to share with young children.)
Teaching Young Children past issues page http://www.naeyc.org/tyc/pastissues includes a link to this article on using the digital camera in an early childhood setting tyc.naeyc.org/articles/digital/pdf/digital.pdf