I came across this article in Time Magazine, about The Ruyi series of guidebooks - interactive treasure hunts, involving cell phone text messages. Invented by Venetian writer Alberto Toso Fei - and so far only Venice is available, though Rome and Florence are promised.
[url=http://www.time.com/time/magazine/article/0,9171,1834434,00.html]Italian Magical Mystery Tour - TIME[/url]
The site where you can have a look at what is involved is [url=http://www.theruyi.com]whaiwhai - play the storyline through the city[/url]
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