3rd Party Logistics Company Seeking Map & Miles App

Right now we are having to use 2-3 different programs when quoting our "opportunities." Our rates our based on price per mile and we need our opportunity fields to calculates miles and have an option for us to view a map of the city. We currently use PC Miler to run our miles and Google Maps to see where the city is. I can send you a screen shot of our opportunity so you can see the flow, but for now see the listed field we currently utilize. Opportunity Owner: Marcos Escobar [Change] *Opportunity Name: Flat - Picayune, MS to Phoenix, AZ *Account Name: CL Industries Inc - Fort Worth Tx Type: Existing Business (drop down) *Origin: Picayune, MS Stop 1: (optional) Stop 2: (optional) Stop 3: (optional) *Destination: Phoenix, AZ *Miles: 1555 Equipment Type: Flatbed (drop down) Equipment Details: (optional field) Truckload / LTL: Truckload (drop down) Weight: (optional text field) Length / Skids: (optional text field) Commodity: (optional text field) Description: (optional text field) *Close Date: 1/6/2012 *Stage: Needs Analysis Probability (%): 20% Amount: (optional text field) Notes / Paid: (optional text field) (* indicates required field)