In the Newark airport a few days ago, I found a place where power grows on trees. It seems Samsung is beginning to install free charging stations in various places, including the Newark airport (this one is near gates 132 & 133 in Terminal C).
I like this idea because it seems it is often hard to find the power oasis in the midst of the airport power desert. I often see travellers wandering the concourses, looking for a place to plug in - frustrated that they are all taken. This approach provides a number of convenient outlets to help travelers (and keep people from unplugging ATM's and other councourse appliances - yes, I have seen that).
Hopefully, this kind of power tree will become more popular - there is an advertisement and a sample of a cool new Samsung phone in the "trunk" of the tree, so they are getting some good branding from this effort.
Oh - and another thing - if you find this (or any outlet) in an airport, it's highly likely there won't be any available sockets. My solution? I travel with a handy travel powerstrip (click here to see my review). This approach makes it easy - I just ask someone if they are willing to share using my powerstrip. I generally find someone who's willing to do that.