Just for laughs I created www.splaterz.com which is a do-it-yourself augmented reality layer for the layar browser. You can create you own points of interest and associated web links via browser and twitter client. If I get time I will add Android client support.
The server side code was created in Grails which was an utter joy from start to finish. I went thru a number of interations adding twitter support, search and acegi authentication and it took about a day all told. Big shout out to all the plugin developers, especially my mate Marc, who lives over the hill. If I get time I will add iphone web client support using the iwebkit plugin I saw at the Groovy/Grails exchange this week.
To have a layer publish you must submit it to the Layar site. Went through one iteration where they objected to an encoding error, but otherwise, pretty stress free.
For those of you wishing to create you own layer this site did did the job for me. Cheers.
Finally, many thanks to @bookmeister for testing and random posts.
Haven’t finished with this by any means but please have a play if you have time.