Sorry guys, so far there haven't been any pics posted that looked like the prototype I saw. A few of them looked interesteding though, especially that blue one that looked like a Ferrari. I will say this though, what I saw looked a lot better, IMO of course, than any of the pics posted so far. I'm wondering though if it will ever see the light of day. Start talking to people you know that owns a Z4 and is not a member of any forums to see if they might have been a part of the event. Everyone was from the SoCal area. I hope the pics surfaces soon. Also, thinking back there seemed to be slightly more women present than men so start asking the women you see.
It may give you that excuse you've been looking for.