WP Plugin: Psychic Search
What are people searching for on your WordPress powered website/weblog? It's an important question as once you know, you are able to cater the content that people most want to consume.
The plugin installs a menu selection on your WordPress dashboard that reveals the keywords searched on and how many times in the last 24 hours, last seven days and the last 30 days. Psychic Search also offers up the last 100 searches from search engines.