User-agent: Googlebot
Crawl-delay: 20
Allow: /

User-agent: Slurp
Crawl-delay: 10
Disallow:

User-agent: msnbot
Crawl-delay: 20
Disallow:

User-agent: Gigabot
Crawl-delay: 60
Disallow:

User-agent: BecomeBot 
Disallow: /

User-agent: ia_archiver 
Disallow: /

User-agent: *
Crawl-delay: 100
Disallow: