I applied through an employee referral. The process took 2 months. I interviewed at Meta (Menlo Park, CA) in Dec 2013
Interview
I received a mail from HR to give my basic information and programming skills. There was no phone interview with HR at all so we arranged technical interview through mail. The interviewer was very nice and polite, so you don't have to be scared at all. It will help you if you stuck.
Interview questions [1]
Question 1
On my technical interview I was asked questions about time and space complexity, and to implement some simple algorithms. Example - check if string is a palindrome.