WhenX is a tool for creating Semantic Alerts. You can ask a question, and it will search the web and answer it. After that, it will monitor the web and alert you when the answer to your question changes. New opportunities arise when the answer to a question changes. For example, when an author releases a new book, the answer to "What was the last book released by author X?" changes, and you may find a new interesting book by your favorite author. Or when the question "What is the best CRM tool for small business?" may be an opportunity to switch your current system.