User-agent: *
Disallow: /administrator/
Disallow: /cache/
Disallow: /components/
Disallow: /images/
Disallow: /includes/
Disallow: /installation/
Disallow: /language/
Disallow: /libraries/
Disallow: /media/
Disallow: /modules/
Disallow: /plugins/
Disallow: /templates/
Disallow: /tmp/
Disallow: /xmlrpc/

User-Agent: Googlebot
Allow: /

#recommended by Site Pro News article by Mike Banks Valentine of Publish101.com:

User-Agent: msnbot
Crawl-delay: 10

User-Agent: Teoma
Crawl-delay: 10

User-Agent: Slurp
Crawl-delay: 10

User-Agent: aipbot
Disallow: /

User-Agent: BecomeBot
Disallow: /

User-Agent: psbot
Disallow: /

# this identifies the wayback machine User-Agent:

User-Agent: ia_archiver
Disallow: /

# the NameProtect.com bot
User-Agent: NPBot
Disallow: /