There are a couple of cool nailed threads that let us see what members and their cars look like...
What the heck do you look like? ...
Members 914 pictures...
But it can take a lot of time to go through those threads looking for someone... and they might not be there.
In every post, the member's name is a link to their profile, with personal info; Web page, location, interests, etc. That would be the perfect place to have a couple optional photos - At least one for the person and one for a car.
I think it would be cool to be able to click on a member's name and see their mug shot and their car.