Do you know that feeling of your pocket vibrating or ringing, eventough you didn't get a new SMS?
my solution for that, is a LED pin that lights up when u get a new message to your cellphone..
it needs a BlueTooth interface, and a dedicated cellphone applet..
LEDs are very beautiful as clothes-pins. It is like a small jewel! in addition, LEDs have integrated pins!
this is beautiful - http://ignaciopilotto.wordpress.com/2008/09/03/swarovski-led-sutil-energies/
no graphic sketch or prototype yet...