Share 'New Technology for CI - What's Your Favorite?'

What other types of new technology, especially "web 2.0" tools, do you find valuable? I'm thinking of tools like technorati, del.icoi.us and Linkedin and custom RSS feeds. I suppose you could include the whole pantheon of Google apps in there as well. You might also include high end tools like what Anderson Analytics offers. I'm interested in hearing how other people have adapted some of these...