1. A method, comprising: at a portable electronic device with a touch screen display: detecting a first gesture on the touch screen display; responding to the first gesture by displaying a first soft keyboard, the first soft keyboard containing a plurality of keys, the plurality of keys in the first soft keyboard including primarily letter keys, the plurality of keys in the first soft keyboard including a first keyboard selector key for selecting a second soft keyboard different from the first soft keyboard; detecting a second gesture on the touch screen display; responding to the second gesture by displaying the second soft keyboard, the second soft keyboard containing a plurality of keys, the plurality of keys in the second soft keyboard including: number keys, a first group of non-letter keys, and a second keyboard selector key for selecting the first soft keyboard; detecting a third gesture on the touch screen display; and responding to the third gesture by displaying a third soft keyboard that is different from the first soft keyboard and the second soft keyboard, wherein: the third soft keyboard is made up of a second group of non-letter keys and symbols and includes a plurality of non-letter keys of the first group of non-letter keys that correspond to non-letter characters; the first soft keyboard includes a key that, when activated, capitalizes the next letter chosen; the second soft keyboard includes a key that, when activated, initiates display of the third soft keyboard; and when the second soft keyboard is displayed, the key that, when activated, initiates display of the third soft keyboard is displayed at a location on the touch screen display that was previously occupied by the key in the first soft keyboard that, when activated, capitalizes the next letter chosen.