Apple's App Store Reivew Guidelines, which they made public not too long ago, are seemingly working out for developers. It only took eight days before the first previously banned applications started seeing the light of day inside the App Store, and now that we have Google Voice applications showing up, what's next? Ringtone makers, that's what. And it's not just one of them, either. As of the time of this writing, there are five different ringtone maker applications now available in the App Store.