Free APIs may lack the gee-whiz pizzazz of Google Earth, the company's offering revealed last week to let people zoom in using satellite imagery to "street-level views." But for businesses, the APIs are likely more practical.
The Yahoo Maps API enables developers to create customized maps by overlaying content, which could range from weather reports to garage sales.
Both companies offer the APIs free. But you'll need to work through the companies' discussion groups if you need support.