Personality Types and Assessment
Personality: Character and Temperament
The official Web site for the Keirsey Temperament Sorter and Theory includes brief descriptions of personality types.
Resource Materials on Personality Typing
Here you will find a list of books and periodicals about personality typing.
A Summary of Personality Typing
Don't miss this posting which gives fairly extensive information about the 16 Myers-Briggs Types including their statistical representation in the population.
TypeLogic Home Page
Extensive descriptions of MB personality types and email addresses for mailing lists based on types.