HI friend, The pattern of IIT JEE 2008 is still not official. We suppose that it will have only mains with an objective type paper as it was in 2007. But there are rumors around that this time it may be a subjective paper with a prilims in december and no one has any idea about what is the truth. So wait for official decleration in this matter. As far as marks by toppers are concerned i think they lie somewhere between 75-85 percent
Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi