Didn't join the contest but here is the link to some snaps I took from the event:
BIMMERCEBUFEST 2010 - a set on Flickr
Improvement suggestions:
1. Put lights in the four corners and shine them inwards rather than in the center shining outwards. The cars in said corners are in the dark.
2. Put chairs so people can listen/watch the free concert comfortably.
3. Put labels on the hood of the cars to identify them. Not all of us are car enthusiasts.
4. Provide trash cans and portable toilets.
5. Have more models we an 'drool' over

(I'm not sure whether there would be more tomorrow of course but today was disappointing. I was looking forward to seeing at least 1 model per car. Ha ha ha.