0 (Ice Cream Sandwich) including a nice new Holo style theme*
*NEW: multiple messages in popup, simply swipe left/right to browse unread messages*
SMS popup provides a convenient popup dialog when a message is received that allows you to quickly read and reply to messages. It also provides in-depth customization of message notifications including contact specific sound, vibrate and LED settings.
NOTE: SMS popup does mark message as "read" - ...