More options and some answers to common questions:
http://www.google.com/quality_form

(quick note: the link for "Concerns about search results content?" is broken)

Old form:
http://img9.imageshack.us/img9/8311/oldqualityform.png

cached version of the missing section you mentioned:
http://209.85.129.132/search?q=cache:ophi-Z8sKQMJ:www.google.com/support/websearch/bin/topic.py%3Ftopic%3D360+http://www.google.com/support/bin/topic.py%3Ftopic%3D360&hl=en&ct=clnk&cd=1&client=firefox-a