I'm sure there must be prototypes. As late as the August World of Amiga show they had announced a tentative release date of September '99 and the pricing structure (starting from $799) and were advertising heavily in Amiga mags and taking pre-orders.
http://www.amigahistory.co.uk/phase5g4ad.jpgThey wouldnt have done that without having working prototypes I'm sure.
