Home page improvements (including a bigger map)

I thought it was unfortunate how little the map was. I set out to make it bigger, but I got distracted with colors and type and things along the way.

I hope you approve of the visual changes!

![pdxnode](https://f.cloud.github.com/assets/174740/1508244/fdaf9cc6-49e3-11e3-9354-f2bebbc2e992.png)