at this time i´m testing the AR-Tool “Flartoolkit”.
Download the Toolkit, export your models in collada and hold them in your hand.
Flartoolkit run´s in your browser (Flash), so you can share it to your friends.
That is so cool.
Toolkit download an turorial - http://saqoosha.net/en/flartoolkit/start-up-guide/
My test - http://eisklotz.de/?p=429