Check out this replica Star Trek Communicator from the original series.
This USB Star Trek Communicator may look like a toy, but it actually does some other cool things. Connect this usb device to your computer running XP, Vista, or OSX via a USB cable and you can make (VOIP) voice over IP speakerphone calls using Skype. The Communicator also features a volume control and mute button for those covert discussions with your away team when your nose to nose with a Klingon.
The Communicator features do include sound clips from the original series. No price is announced yet, but sources say it will be available from Dream Cheeky in April.