I found it curious that Google has erased an mention of the word wiki in Google Sites. Stewart Mader also picked up on the omission of that four letter word: The nasty four-letter word that must be banished from the web. It looks like a wiki and acts like a wiki why not use the term. Editable webpage is not very descriptive.
I found it problematic that Google packaged it into their Google Apps rather than as a more free standing application. I have my issues with the Google Apps. I like using Google Docs, but have a hard time navigating around the rest of Google Apps. I can get a PBwiki set up in seconds. Google Apps does not match that speed.