Most jobs I've seen (in the USA) offer up to two weeks of "paid time off" which you need to split between vacation and sickness. The concept of taking more than a contiguous week off per year for an actual vacation must be pretty rare. Usually my vacation days get used for the purpose of running an errand or taking care of a sick kid.
Since becoming an entrepreneur, I have never had a "vacation" - Sure, I went to different places, but always with laptop and a bag full of assorted devices in tow. I was thinking of going back to a "regular job" for a while, just to relieve some stress. Alas, I had another idea and won't be able to rest until that is built :)