So as it stands, Apple developers will be receiving today what should be the last update to iOS 7 before the gold master is released next month. Originally, Apple planned on releasing 6 betas but the iTunes fix forced Apple to add another beta to the plan. Apple should have iOS 7 beta 7 available at around 1PM EDT. The build number is much higher than the one on the previous build.
As is the custom, Apple will most likely release the latest version of its mobile OS just days before the next iteration of the Apple iPhone is launched. The most recent rumor is that the Apple iPhone 5S and Apple iPhone 5C will launch on October 25th.