I applied through a recruiter. The process took 4 weeks. I interviewed at Google in Mar 2011
Interview
Took more that a month to get a phone interview (screening).
Several emails with a recruiter mainly asking for GPA and that sort of things...
Phone interview with a current PM, lasted about 45 min. The guy on the line was easy to talk with.
Mainly questions on current Google products. A few technical questions.
The process seems to be design for people out of school.
Very self-driven, first of multiple rounds, where I had to take the initiative to arrive at the problem, constraints, approach, solutions, tradeoffs and reasoning behind it in a matter of 30 minutes.
You would have to do a hiring assessment first, then a recruiter screening follows. First round interview with the hiring manager. Majorly product sense and product improvement. The questions were not direct though.
Overall a lot of steps to the interview process. Talked to different people and had opportunities to ask questions. Many different stages which made it a lengthy process overall. Wasn't too bad.