Dick Tracy cliches aside, this long-promised watch-phone could finally become a reality as soon as next month. Australia's SMS Technology claims that its M300 is the "world's smallest phone," a mobile device that could otherwise be easily mistaken for a digital wristwatch that can work with any GSM network. It has a color screen, MP3 player, USB port, speakerphone and Bluetooth compatibility. I4U News says it's scheduled to start shipping March 25 for about $500 in a variety of colors--yes, including pink.