From an old business classic, Loyalty Effect, Frederick Reichheld's approach to employee loyalty is refreshing: sniping high quality talent from other firms is unfair to loyal employees and sends the wrong message: that the best way to make money is to hop firms. Google and Facebook are setting a precedent that will lead to short sighted hiring cycles and unneeded office drama.
So my buddy Nathan was learning how to code PHP about 6 months ago. His first project was just a one off / fun web app called http://www.Natebook.com. Anyway, he knew the site would never catch on or be viable, etc. because facebook could just send him some cease and desist letters and shut it down.
We are Microsoft. Unix is irrelevant. Openness is futile. Prepare to be assimilated.