The process took 1 day. I interviewed at iCelero (San Jose, CA) in Feb 2013
Interview
There were approximately 10 rounds lasting 9 1/2 hours.
A few of them were telephonic and the others were personal.
I was interviewed by everyone from my colleagues to the directors of the company.
They didn't waste time with random puzzles - instead it was mostly about hypothetical situations one would encounter and the strategy for dealing with them.
Interview questions [1]
Question 1
A situation XYZ that you would encounter while you are doing your work