Are there modules to do this ?

Hi, in the true spirit of Drupal I am looking for modules that suite my need before going off on a development spree...

1) I am using location to store information & gmap to display it. I have gotten to a point where there is too many points that are too close. I'd like to display the same information as a heatmap. Are there any drupal modules that could help me ?

2) Is there a batch geocoder for rows in the location table that were not geocoded ? This is because I have a webservice that can't affored waiting for a geocode request to complete... so I want to save directy to the table and geocode on crons.

Thanks