It's a shame to see that text-to-speech is absent from the light $79 model (it's present in the touch). At 6 ounces, that would be exactly the model I'd want to have TTS, which has been a killer feature for me. I actually prefer the robotic voice to most audiobook narrators for a lot of material - the affectless delivery must be how my internal voice reads a lot of books. Here's hoping Amazon puts TTS functionality into their Android/iPhone apps sooner than later - I'd gladly pay a $20 in-app purchase...