I often peruse Google’s zeitgeist. This offers a little insight into search trends, covering most searched terms in the US and around the world. Geeky, I know.
A more comprehensive list has once again been compiled at Google Blogoscoped by collecting a list of the top words used online. Not too many surprises in the top 30 list. Possibly a little more interesting is the ‘movers and shakers’ list. Unsexed? Fleapit? What are people writing about?