it seems that Wikipedia is the goole little baby it comes top on the hottest keywords see these examples:

wikipedia comes:

• 2nd for:sex
  
• 1st for:hacking
  
• 3rd for:Britney Spears
  
• 1st for:school
  
• 2nd for:immigration
  
• 1st for:internet
  
• 1st and 2nd for:china
  
• 1st for:tourism
  
• 1st for :e-book
  
• 2nd for:cancer
  
• 2nd for:ipod
  
• 2nd for:counter strike

and it's getting bigger day after day