General Sites about Personality Psychology
The personality-project.org maintains a very comprehensive and interesting site. There, you can find good coverage of a variety of topics. For example, Hans Eysenck's trait model, psychoticism-extraversion-introversion (PEN) is covered, as is the Big Five. The site has been revised recently, making getting around even easier.
Another excellent site for personality psychology is Scott Acton's personality research page -- "Great Ideas in Personality." This is another full-featured and general site, with information both on the latest psychological research, and incisive commentary on personality theory.
See also, the social psychology network, which has some information on personality psychology, though its focus is social psychology.
There also exists the European Association of Personality Psychology (EAPP), at this address.
Sites Dealing with Specific Interests in Personality Psychology, Clinical Psychology, and Related Fields
This site focuses on the self and identity, and is maintained by the International Society for Self and Identity:
This site focuses on scientific bases of clinical psychology:
Links to Psychology In General -- With Content On Personality
The American Psychological Association web site has a great deal about careers in psychology.