And here’s the third piece of the puzzle: Google’s response to the FCC. The document includes a description of Google Voice, why a native application would be beneficial, and how many other apps Google has pending with Apple (none). There is one section redacted, pertaining to the conversations Google had with Apple over the Google Voice ban. Also see AT&T’s response and Apple’s Response, in which both companies deny any wrongdoing, and AT&T denies any involvement at all.
Google Response to FCC http://d.scribd.com/ScribdViewer.swf?document_id=18983640&access_key=key-185kvla9cbq8tnschq1u&page=1&version=1&viewMode=list