IIT Bombay has been the top choice for this year followed by IIT Delhi. 69 out of top 100 rankers opted for IIT Bombay followed by 19 in IIT Delhi. If u consider the rank wise cut off for computer science in IIT Bombay, then B.tech course was filled up till AIR 47. and the dual degree course filled up till 198.
If u want to see the detailed cut off of the various branches of the respective IITs this year. Please follow the link www.askiitians.com/iit-jee-2009-rank.aspx .