What iWant from the iPhone: voice commands

I don’t have an iPhone. But if I did, here’s what I would want it to have: voice commands, so that I can use it while driving.

While listening to podcasts:

• “back up” or “repeat” to back up a few seconds
• “pause,” “play,” etc.
• “faster,” “slower,” “normal speed”

Email:

• iPhone reads the email to me
• “next message,” “delete message,” etc.
• Dictation, a la Dragon NaturallySpeaking. Okay, I know that’s way too much to ask from such a small device, but maybe someday…

When using as a phone: “call Tom” (standard voice dialing, as some other phones already have).

What else?