We just started a new project with a new customer last week. As it turns out, my counterpart on the customer side is into cars, autocrosses quite a bit (new EVO), does lapping days and recently started this site. It has road race courses and drag strips on it as well as a forum. I think the guy who started the site is looking for ideas on what additional information would be interesting for the site (I think that hotel information for the tracks would be useful).
He's hoping to see some usage. Check it out and see what you think.
http://www.racetrackdb.com/