While browsing through TechNet. I came across few good articles related to Passwords by Jesper.

Worthy to read least once.

1.    Frequently Asked Questions about Passwords and Password Attacks

http://technet.microsoft.com/en-us/library/cc512606.aspx

2.    The Great Debates: Pass Phrases vs. Passwords series

http://technet.microsoft.com/en-us/library/cc512613.aspx