For months, the Bing Maps site has been showing off what are essentially embedded mashups. You can search nearby tweets, FourSquare check-ins and other content from partners. Until now, it was merely a showcase of apps either written internally or by a company that Microsoft had blessed. Now, you have the opportunity to get your mashup included on Bing's map.
eeGeo has released a Points of Interest API that allows developers to submit and manage custom points of interest to be used primarily with the eeGeo example app. The API also allows outdoor POIs to be created and includes search query options such as free text search and category search.