Google Maps layer

What do you guys think about this Google Maps layer, @vincentlaucy @hupili @2blam @clacanzo?

![image](https://f.cloud.github.com/assets/38583/2177408/01119ac2-9615-11e3-8ad6-1c6af5e4e6fd.png)

![image](https://f.cloud.github.com/assets/38583/2177410/118bd764-9615-11e3-9ac9-84a7670d07ad.png)

Pros:

 - So much cleaner and easier to digest

Cons:

 - The zooming is kinda weird because the geojson layer is kind of out of sync
 - Seems to use more CPU?  My laptop's fan gets louder when I use this map.