Toontown Online racers can compete this weekend in an in-game competition for paid and free players alike. From Disney Online:

Grand Prix Weekend Returns to Toontown Online!

Toons of the world -- start your engines! It’s time to get ready for some white-knuckled, Toon racing madness with the return of the wildest event this side of Toontown Central -- the Toontown Grand Prix Weekend!

Disney Online will host the Grand Prix Weekend (GPW) over the four-day Memorial Day holiday weekend, during which players will race in up to four (4) Grand Prix circuits and Disney Online will award the top four (4) fastest players in each circuit, per day. This will result in a minimum of 16 winners per day (64 over the four-day weekend) with the potential for ties.

All players can, and are welcome to participate. This means that Free players will have all of Goofy Speedway/karting unlocked for this four-day weekend. They can kart as much as they like, and their ability to race is not tied to this event.

Also, Goofy will be supporting the event with updated chatter. Starting this week, his chatter will be centered on “fixing” the leaderboard that was broken during April Toons’ Week, and preparing players for the event. Then, during the week of the event, his chatter will be about the fixed leaderboard and the event.
Disney's Toontown Online