Dropbox is the easiest way to store, sync, and, share files online. There's no complicated interface to learn. Dropbox works seamlessly with your operating system and automatically makes sure your files are up-to-date.
Cloudme, Dropbox, and Box.net
Upload files online
Polls and Quizzes
Chat (video, voice & text)
http:// www.niu.edu/blackboard/wimbaclassroom /
Semantic Web (The next big thing?)
The Semantic Web is “a web of data”. HTML describes documents, while RDF describes things. It extends the network of hyperlinked web-pages and how they are related to each other, enabling automated agents to access the Web more intelligently and performed tasks on behalf of the user