In addition to Apple answering the FCC's questions regarding the supposed rejection of Google Voice apps from the iPhone app store.
In Apple's response the company said that it has not rejected the official Google Voice app but "continues to study it". Apple's main concerns lie with how the app contrasts with "the iPhone's distinctive user experience" and "disables Apple's Visual Voicemail."
AT&T's (below) response clearly states that the official iPhone carrier had no role in Apple's consideration of Google Voice or related applications. The Apple and AT&T deal prohibits the operation of VoIP calls on AT&T's network, but AT&T plans to "take a fresh look" at authorizing VoIP apps that run on 3G.
Google's response is strange completely redacted as seen below.