I uploaded a couple of videos to my YouTube channel showing some of the enhancements to Speak Selection and AssistiveTouch in IOS 6. Speak selection now does word highlighting as the text is spoken aloud, and it also supports a number of dialects (Australian English, British English, Mexican Spanish and so on). AssistiveTouch is not only now compatible with VoiceOver (a great addition for those with multiple disabilities and those who rely on switch access) but it also can now be used for launching Siri, taking screenshots, and opening the task switcher for multitasking.