This could be worth changing to, especially with the auto post to delicious. The groups, annotation and highlighting are the main points of difference that appeal to me.
A network of teachers committed the purposeful use of learning technologies to enhance learning and teaching. We plan to build a rich community of learners who will work to develop their professional currency and relevance.
eLearningFuture provides comprehensive information about the design, development, deployment and evaluation of eLearning using today's and tomorrow's innovative emerging technologies.
The site is quite academic but has some great articles especially the current ones on Virtual World learning