I subscribe to Motorcycle Online ( http://www.motorcycle.com ). This is a pay site and an excellent site if you are the least bit interested in motorcycles, they don't do much of anything with scooters.
To my surprize they were invited to the launch of the Piaggio MP3 and have an excellent review of the 250cc version. As this is a pay site I will not divulge much, but will suggest that the small yearly fee is well worth the price of addmission if for the MP3 road test alone.
Thier bottom line - the MP3 is great and the technology could and should be ported over to serious motorcycles.