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.
Brady Forrest over at O'Reilly Radar has a new post that highlights an unofficial release of preliminary API for Latitude, Google's geo-location sharing service. Although the API has not been formally identified by Google, the API can be seen in use in two new apps: the new Google Location Blog Badge and Google Talk Location Status.