I added a new plugin in the dev section : QR Code Creator : http://www.scirra.com/forum/topic56438_post351843.html#351843
The technical details are in the other thread, but that means that you can create a quick code to be displayed by your game or webapp.
With that, user seeing the page on their desktop can snap a quick picture with their smartphone to load the page on their smartphone, without typing a long URL !
As a demo, a code generated by the plugin to link to this page :
<img src="https://dl.dropbox.com/u/1412774/QRCodeDemo2/demo2.png" border="0">