After speaking to HR a few times...an interview was scheduled at last. i had two 1:1 interviews and then did not hear from them. After constant calling, the HR person said that the interviews were excellent but the business requirement has changed and they have frozen hiring right now.

very lengthy and sometimes they can forget to keep you in loop. Its also probably because it is so sought after. However, the number of interviews give you the feeling that they ensure they are right about who they hire.