Shoudio is a location based audio platform that lets users record and share geo-tagged audio snippets with friends via Shoudio.com, Twitter, Facebook and Foursquare. The API lets developers retrieve data and post shoudios of their own. The API uses RESTful calls and responses are formatted in JSON.
Shoudio is an amusing iOS application made to tag places with audio snippets. These can be anything a user imagines, and a lot of fun could be had with this. For example, integrating this into Geocaching could be a lot of fun, allowing things like audio hints to help Geocachers find the cache. However, the developers of Shoudio didn't want it limited to just one platform, so they released a Shoudio API to allow clients for other platforms, and fun mashups.