"It's the three wheel deal"
See the MP3 gets a pretty good writeup in the financial times.
http://search.ft.com/ftArticle?queryText=vespa&y=0&aje=true&x=0&id=070126007161
Actually growing to it, reading about that tilt lock... keeping both feet up when coming to traffic lights sounds very nice indeed.
This was also published in the Saturday FT newspaper around Britian, rather impressive.