User-agent: MediaPartners-Google
Disallow: 

User-agent: Googlebot
Disallow: 

User-agent: Googlebot-*
Disallow:  

User-agent: Slurp
Disallow:  

User-agent: Bing
Disallow: 

User-agent: MSNBot
Disallow: 

User-agent: *
Disallow: /