I came across this new plug-in called Plug n Play Google Map. It works pretty good. I installed it on my experimental site. It has some issues though:
1. Multiple events with the same location don't get listed on the info balloon. Only one of them does.
2. Future events don't show up. (if you are posting about an event with future time it won't show up on the map until it is past :(.
Anyone want to help me with this?