One of the things that I enjoy about this time of year is that the search engines release reports on what the most searched for words were during the past 12 months. Google just released their Google Zeitgeist 2007 Report (Yahoo did their one last week).
At Google the fastest growing terms globally were:
8. second life
10. club penguin
There’s plenty more in the report though – food for thought as you’re looking at popular topics to write about.