Web publishing is not simply about putting your brochure on the web. It's much more powerful than that. Here are some examples of organizations who are fully taking advantage of the new digital medium for spreading their messages:

Environmental Defense Fund The Environmental Defense Fund is a not-for-profit environmental advocacy group with
four main goals: (1) Stabilizing the Earth's climate, (2) Safeguarding the world's oceans,
(3) Protecting human health, and (4) Defending and restoring biodiversity.
ShoreBank Pacific ShoreBank Pacific lends to small businesses and
provides information on conservation improvements
that can increase a borrower's bottom line and the
value of their business.
WebActive RealNetworks' tool for progressive activism.