I find a interesting auto site: aoto.us, It's a automotive focused
news site where the stories are chosen by community members rather
than editors. it's a site like digg.com with Industry News, Racing,
Shows & Events, Financing, Insurance, Auto Repair, Car Rumors,
Automakers, Auto Pictures and World & Business.

you can visit it with http://aoto.us/

The following is the intro from aoto.us
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Aoto is a user driven social content website. Ok, so what the heck
does that mean? Well, everything on Aoto is submitted by our community
(that would be you). After you submit content, other people read your
submission and Vote what they like best. If your story rocks and
receives enough Votes, it is promoted to the front page for the
millions of visitors to see.

What can you do as a Aoto user? Lots. Every person can vote (help
promote), bury (help remove spam), and comment on stories... you can
even Vote and bury comments you like or dislike. Aoto also allows you
to track your friends' activity throughout the site - want to share a
news story with a friend? Aoto it!"