Earlier this year, Google requested map data from the Korean government. In response, Korean tech companies Naver and Kakao have increased free limits to their respective maps APIs beyond what Google offers. The government is expected to respond next month but the competition has already started.
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.