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.
MobileMotion Technologies, maker of the MobStac mobile platform, recently launched the MobStac API. Developers can integrate the MobStac API with any programming interface to create and manage mobile sites and apps. The MobStac platform has cemented itself as a trusted leader in mobile development, and the API simply expands its reach.