my sister went for a job with ASIO a few years ago (im sure theyll hunt me down for saying this...)
and it was worse than applying for the military. Took 8 months to get to round 3 or something which is a flight to canberra for an interview. Went through all detail Martin mentioned plus more, social networking sites, previous relationships, IQ and psychological tests. Didn't get the job anyway or didnt hear back and just moved on with life. I was more concerned that the government spends so much money investigating possible employees and spends so much time and money doing it, only to never hear from them again probably because they take so long.