Never stop tweeting with TwitterPeek

TwitterPeek, a device dedicated solely to tweeting, comes out today. No wi-fi or phone network is needed -- it's always connected. But at $200, how vital is TwitterPeek when so many devices can tweet and do much more? Putting together a few sample tweets, I can see that TwitterPeek is sensibly designed and easy to use. The only major caveat is that I have so far not found a way to navigate within a message while typing -- a key task for editing messages before updating, especially if the character count becomes an issue. But, seriously, TwitterPeek does nothing else but update Twitter. Is that useful? Wouldn't most people who update Twitter enough to need a dedicated device already be connected enough to have other devices that tweet? I asked a colleague, Leslie Plesser, who loves Twitter and uses it all the time, what she thought of TwitterPeek. Her response when told the price: "I think it's ridiculous. I don't even know who would use it." Would you?

Update: For posterity: I figured out how to navigate within a message while composing one, after finding a FAQ for Peek's email device. To move the cursor up and down, you turn the scroll wheel. To navigate right and left, you hold the shift button while scrolling the wheel. Not horrible to use, but having arrow keys might have been better.