Just a quick heads-up: If you have an android mobile device and want to have some fun with augmented reality, go on the five-minute augmented-reality scavenger hunt. See my aug.mx blog post for details.
Update 10-Feb-2010: Congratulations to Dave Pease of Liverpool, UK, who was the first one to successfully complete the five-minute augmented reality scavenger hunt! Dave walked to the other side of the augmented reality 3D snowman, and identified that the symbol on his back is a Christmas tree! Dave sent a screen shot from the Layar Mobile Browser running on his Android as proof:
Quoting Dave: "Here's the evidence. I would have got closer, but it would have involved trespassing and possibly receiving numerous dog bites!"
I don't blame you, Dave. I hear that blokes in Liverpool don't take well to people walking around their back yards pointing mobile phones in the air ;-)