I have been keeping a watch on a thread over at smartcarofamerica where there have been a number of reviews and driving impressions from the smart car and event.
http://smartcarofamerica.com/forums/showthread.php?t=77
Overall, I think the car is great for what it is and I will be excited to see what aftermarket world becomes available for it.
As for the event, I have heard and seen for myself that each event goes completely different. the first event I went to was kinda messy and I waited in line for about 2 hours just to drive the car.