A couple of weekends ago, my brother and I played FlatOut head to head and had an absolute blast!!!
http://www.gamespot.com/pc/driving/flatout/index.html?q=flatout
The driving physics are excellent and it begs to be played with more people (up to 8 people on a LAN).  To that end, I just bought a force feedback wheel like his (Logitech WingMan Formula Force GP Force Feedback Wheel/Pedals USB) and we are trying to get 8 people together at his house in Lancaster for some white-knuckle bumper-to-bumper driving action.  

We have 3-5 already but we're looking for more.

This is me, my brother (the big guy) and his wife, Tami.  Post here if you're interested.