Beu posted a Search Engine Watch Forums thread after noticing that Google has changed the definition they used for what a doorway page is.

On the Google Page, it now reads:

The cached version still has the old version:

Key sentences, words and adjectives have been removed and replaced by more generic terms. Google seems to have re-written it to discuss less of the technical nature of the page and more of the desired outcome of such a page.

In any event, all SEOs should know about the change.

Forum discussion at Search Engine Watch Forums and Sphinn.