As a suggestion, you *might* want to record the plural version, driversContest.com. Actually the plural version has a more natural flow, and IMHO is the preferred version. It is also available.
edit: that is assuming you like the original version, DriverContest.com. If you like it, you *know* somebody else will pick up the plural... also, with the "s" version, it can operate in the possessive case "Driver's Contest"
Marc