Hello, here are some examples for corporate sites. I am sure there are more.
http://www.knaufinsulation.com - Knauf Insulation corporate Web portal
http://pwcmecareers.com
http://www.hc-si.com
http://v-teches.com/
http://www.acnefree.com/af
http://projectstars.com - corporate blogging
http://flex.org/showcase/ - Adobe software technology
http://genieknows.com/about
http://warnerbrosrecords.com/ - Warner Brothers rockin' it with Drupal.
http://research.yahoo.com/ - http://buytaert.net/yahoo-using-drupal
Please help fill in this list.
Cheers,
Kieran