Not sure if the tasting room would be open every day or only during major events. Not sure what wines they'll pour, but Andretti Winery isn't far away--I'm sure Mario will want in. Jeff Gordon and Richard Childress (a NASCAR team owner) also have "hobby" wineries. Also nearby is Adobe Road Winery owned by a professional sports car racer.
I wouldn't be surprised if Sonoma Raceway gets their own label. It's an eleven turn track so I suggest coming up with a wine named after each turn. Turn two is the most fun; turn ten the scariest, so they'll want to take that into account. The "fun" wine might be a Pinot Grigio blend. The turn ten corner, that puts hair on your chest, could be a Petite Sirah maybe.
Of course, the tasting room and all the other changes they wish to make will depend on their neighbors and the county.
|They'll want to sell trinkets like this wine bottle holder|
Image from hksculptures.com