MapQuest recently released a mapping application on AppExchange. This is a free application that lets you map an Account or Contact (like you would using the default link to Yahoo! Maps), but adds a cool new feature on the landing page that allows you to find nearby Accounts and Contacts. Pretty slick. Chris Kramer has a good write up on it here.
This obviously has some overlap with the mapping work I do with Salesforce.com and Google Maps and it also attacks it in a different way.
I can think of many possible approaches towards mapping data and many different user experiences Salesforce.com users would enjoy. How do you choose one?
What do you think? What would you like to see in an application that maps Salesforce.com data? How would you design it?