Web Stats and Analysis Associations

IAB - the Interactive Advertising Bureau

The IAB is a high-profile, global group pioneering many of the standards for audience measurement online.

The site has an Insights and Research page and one for
Standards, Guidelines & Best Practices

Also a detailed Glossary of online advertising terms.

The Web Analytics Association

The WAA is the US-based association for the profession.

The site has a page for white papers and another for articles submitted by site users. It also provides details of its policies regarding privacy, security and spyware.

The European Interactive Advertising Association

EIAA is collaborating with the IAB on standards for European online ad formats. It also has an Audience Measurement Working Group.