I send email to ask the same Q a week ago. And the application form they put on the website is not active yet. And this is the response_
Application forms for the 2011 selection cycle of the regular JJ/WBGSP will be available by January 2011. Please go to the Program website :
http://www.worldbank.org/scholarships
I hope this will help.
Good luck!
Which school are you applying?