I don't know how firm these are, but Mike hisself told us, back at SpeedWeek, that Charles Nearburg, George and Ron, the Nish family, and (I think it was) the Mormon Meteor will be there on the car side, along with Sam Wheeler, Denis Manning, and the Ack Attack for 'liner bikes. I believe that Max Lambky is going to attend also - but I don't remember if Mike mentioned his bike.
And then there were three sit-on bikers -- Kim and Greg from Australia and their US buddy/teammate, fireman Jim Higgins. I expect there'll be other racers there -- just don't know about 'em yet. I'll be there, that's for sure.