As a surrogate, when did you tell your employer? How did they take it? How long did you get off of work?

I have been wondering the same thing!

I let my employer know what I was doing and they were o.k. with it.  I had surro twins and had to be taken out of work in my 5th month.  I was not allowed to go back to work until the doctor cleared me which was 6 weeks after the birth.  I think they would have been happier if I could have worked until the birth, but they did not say anything to me.  They were great about the whole thing.

I told my last employer (my boss/supervisor) when I was still in the planning stages.  So the pregnancy wasn't a surprise.