This time around, we are likely to see a surge in the number of AR applications participating in the challenge. An early bird, geoPaste, is coming to us all the way from Australia.
As can be seen in the video above, geoPaste lets you annotate reality right through your mobile phone, by sketching little pictures (or loading previously created images). Developer Gary Silva is concentrating at the moment on winning the challenge, but he has a grand vision for his app, "to make AR publishing available to everybody".
After ADC1 I had also seen a Wikitude demo and saw their slant towards providing AR content for consumers, like Enkin ( and which Layar now continues ). From there I thought that AR publishing could be put directly into the hands of end users and was inspired to start working on geoPaste to try to realize that vision. My original thoughts were along the lines of digital graffiti, legal and harmless but at the same time indelible, hence my drawings metaphor.
Good luck on the challenge!
More details, over here.