First of all big thanks for the great and simple plugin you've created!!!
If I might make a suggestion? I've added one very simple thing myself you might want to consider adding into your code.
I've added the line "title: title" to the functions.js file to have the title also show up on mouse over on the map.
Code snippet (including addition), line 159 to 165 of functions.js:
marker = new google.maps.Marker(
position: new google.maps.LatLng(latitude, longitude),