VisualForce Page to perform Mass Contact Transfers. Functions very similar to the Mass Account Transfer page in SalesForce.com except that this page allows you to transfer ownership of any Contact by selecting the From/To user and using up to 5 lines of selection criteria. Selection Criteria works like all other Selection Criteria blocks in SalesForce.com. This page allows the user to reference fields on both the Contact and Account objects when selecting Contacts to transfer. In addition, the Selection Criteria Apex is written so that it can be re-used on another Apex Page.

I search many places and found many complex usage of google-maps. This is the most simple approach for Salesforce-google maps mashup. It uses a single visualforce page and standard objects (Account and Contacts) The functions are loosely coupled and can be reused for any object (Standard or custom)