Is there an awesome SMS application for the iPod Touch that works with an awesome SMS service that will get you SMS messages on your iPod Touch even if you don't have a cell phone number or plan of any kind?
The Google Voice website essentially has all the features I am asking for. Is there a native app that does this? It doesn't have to work with Google Voice.
Edit: The "Peek Pronto" is a device that accomplishes what I want, but it has drawbacks.