Guys, failure isn't the end of the world - they probably have doubts about something so they decided not to let you through. More than half the people who eventually succeed in becoming cadets have failed in some stage of their application before. Failing does not mean you are not suitable to be a pilot, they just won't take risks when you cannot convince them you have what it takes. If they tell you to re-apply after 6 months, then use the time to improve and come back a stronger candidate.
As for the ratio of applicants vs spots... I'm not sure about the exact number of applicants but for arguments sake I'll assume 10,000 because it's definitely not any less than that. They aim to take around 60 candidates in 2010, so I'd say it's 10,000:60... or 167 applicants competing for 1 spot.