Süddeutsche Zeitung Magazin did an AR magazine in the month of August 2010
It uses the junaio AR viewer available for Android and Iphone(symbian version will be available soon).
so basically if you have Junaio installed on your device, just select the "Süddeutsche Zeitung" channel and then point it at the magazine spreads below.
if you have an android device, get Junaio at the app market or
using this barcode
for iOS devices try the app store.
two of the magazine spreads are below
see the rest of the amazing spreads here
heres a video of what you can see
more about the project at the Junaio blog here(Pushing the Boundaries of Print) and
here(Try out the AR magazine) yourself!