a web application with an available bookmarklet that will automatically take text, either pasted in or from the referring webpage, and summarize it in as few lines as possible.
There is a great article over at their blog about how great summaries disambiguate topics. That means that when a word is mentioned it uses context to determine what the actual sentence is about.
TechMeme or "Tech Memorandum" is a website which uses both algorithmic and human based content filtering to give you the top stories. Its blended approach gives readers a great overview of the goings on at any time in the tech world
TIE (Technology & Innovation in Education): a great portal to web 2.0 tools in education. Organized in disciplines, activities, and functions - you can investigate ways to integrate technology into the classroom.