Hi,

Askiitians provide the IIT JEE cut off along with the opening and closing ran given below for IIT JEE cut off:

http://www.askiitians.com/iit-jee-2011-counselling.html

Click for opening and closing ranks:  http://www.askiitians.com/iits-2009-2010-opening-and-closing-rank.aspx

Thanks and All the Best ..

To predict your rank you could use the information on askiitians website. If you want any further information like which branch in which IIT you may have a chance. You could contact me by calling up at askiitians. We will soon be uploading it in the askiitians site too.