And they are opening an investigation into it.
According to a Dow Jones Newswire report, on Friday afternoon the FCC sent letters to Apple, AT&T, and Google. The federal inquiry asks Apple why the Google Voice application was rejected from its App Store for the iPhone and iPod Touch, and why it removed third-party applications built on the Google app that had been previously approved. The federal commission also asks whether AT&T was allowed to weigh in on the application before it was rejected, and seeks a description of the application from its creator, Google, according to the report.
For background, see my piece chastising Apple here.