The IOS 5 Iphone 4 S has Siri, the digital assistant, who is pretty cool, but she sometimes gets overloaded, especially at drive home time.
IOS added a little microphone to the compose screen on reminders, notes, email, messages.... and you can push on it to dictate, push the button to stop, and it will use same voice recognition to paste results in to the particular app you're in... not as fun as telling siri to text or remind you, but it works!