Google Map / Form Input

I would love to have some guidance on any recommended plugin, etc that will allow:

1)Google Earth or map to be displayed on a specific page (I have this covered).

2)I would like for viewers to be able to add Earth point (KML, L/L, or something via a form) or to define their respective position on the map and add a tag. I dream to have an option to offer a handful of tag choices and then for the submbit button to add it to the map.

It would be great to have the process automated and I would gain the data, as well as the submitter offered details.