SE Games does have the rights to the Champ Car series and is to develop it after they launch a Karting game later this year. Their web site is under construction now but I did see the announcement a number of months back. Stephen R. King, Missiauga, Ontario, Canada
04/21/06 More info on this Champ Car SIM can be found here.
04/20/06 Rumor has it that a Champ Car PC-based SIM game is under development by a company called Team IDT. We uncovered this teaser video clip. The previous company S-E Games appears to be out of the picture now.