Just an update field, just for Twitter, for your iPhone/iPod Touch. If you're like me you get your twitter updates on the go via SMS, but you have to pay to send SMS back to twitter. You might even be slightly bitter about this. So all you want in an app is an update field, and perhaps a counter of remaining characters, one that if the update fails won't lose your text. The source code for JustUpdate is available from the "Patrick Quinn-Graham website" link below.