Apple recently released iOS 7 Beta 2 to Developers. iOS 7 was first announced two weeks ago at WWDC 2013 and the first Beta was released the same day. Beta 2 is available over-the-air to iOS devices and through iOS Dev Center.
The new Beta includes iPad and iPad Mini support, Voice Memos and the ability to change the gender of Siri.
iOS 7 is expected to be released later this fall for iPhone, iPad and iPod Touch.