Being worked upon by Zubin Mithra(zubin71 #sahana, #sahana-py)
A python module for a geolocator
   using Google(implemented)
         GeoCommons(pending)
         Yahoo APIs(pending)

Input : service_name, location name
Output format : JSON(easy front end parsing)

Output most likely to be used in : OpenLayers

So a simple controller function would be nice to access the module classes


Also add, 
1. functionality for BBOX
2. provision to get results from all services
3. provision to get results in multiple formats(xml, JSON, kml)

to check out
1. OpenStreeMap.org