Keyword development is key to any SEO endeavor.

Mining keyword searches can also be valuable in product development. With very specific product searches, users (i.e. potential customers) are telling you EXACTLY what products and services they are looking for.

Check out these resources. Each offers different insights into keyword search and trends.

• WordTracker
• Yahoo
• Microsoft
  (beta site: includes search volume forecasts with age and gender breakdown)
• Digital Point Solutions
  (Draws research from Yahoo and WordTracker)
• Google
  (correlates keyword searches with related events)
• Trellian