Maybe this nice documentary... blocumentary about "AFOL" (=Adult Fan of Legos) interests some here:
https://vimeo.com/9581676
The car dude I linked
here is in it. Otherwise nothing to do with lego cars specifically.
I'm not "AFOL" like in that document, but lets say whenever I have digged up Legos for sisters' kids etc. it has been a good excuse...