Just FYI I created a gem to easily integrate google maps within
- display styled markers, polylines, polygons, destinations...
There is much configuration to fit your needs.
It was presented here: http://rubyshow.com/episodes/157
The source is here: https://github.com/apneadiving/Google-Maps-for-Rails
And screencasts are available here: http://www.youtube.com/user/TheApneadiving
May it be useful,