Great Place to be aware of what's going on with the blogosphere, includes: a blog directory, popular tags, and much more great stuff for bloggers! - http://technorati.com/
"Twitter Search helps you filter all the real-time information coursing through our service.", also a great place to find what trends are "hot" today! - http://search.twitter.com/
Smartkit is home to all sorts of puzzles (jigsaw puzzles, sudoku, cryptograms) to help you train your brain, and to break some work with funny games! - http://smart-kit.com/