Here's a wild guess from my point of view in $, am I completely wrong? These only go for top drivers, and post your guesses and knowledge about salaries among motorsport stars

F1: 10-25 millions (ranging from Button to Alonso)
NASCAR: 15-35 million (Dale Jr.) Jimmie probably around 20?
WRC: 4 million (Loeb)
MotoGP: 3-5 million (mortals), 10 million (#46)
DTM: 1.5 million?
WTCC: 1.5 million?
V8: 2 millions (Whincup ?)
Superbike: 2 millions (Haga ?, Biaggi ?)
IndyCar: 8 millions (Danica), 4 million (Franchitti, Castroneves et al.)
BTCC: 500 000 (Plato), can't imagine anything more...
What do you think the drivers earn?
Sensing F1 market value (promotional, experience, past success, future longevity as such) I'd put them like this:
Hamilton 30
Alonso 25
Vettel 15
Schumacher (still 15, but earns 7)
Button 13
Kubica 10
Massa 8
Webber 6
Rosberg 5
Sutil 2.5
Kovalainen 4
Trulli 3 (though probably on a higher retainer...)
Glock 3
So guess away, and have fun
