GeoMata Client is a part of the GeoMata project, which maps geographic locations to web content (audio, video, html).
The GeoMata project provides an open REST service that maps geographic locations to web content (audio, video, html), and a mobile client for accessing this data. The mapped spots are called "blips". The GeoMata Android client displays these "blips" either on a map or in list form, sorted by proximity to your current location.
The application might be useful for travelers. Once you are standing next to a monument of some historic person, you can launch GeoMata on your mobile device. GeoMata, using the devices GPS, will provide you with a list of available web content. This might be a Wikipedia page pertaining to the person or monument your looking at.
The hardest part about a service like this is gathering all the data to make this a really useful application. The authors bootstrapped GeoMata with over 140,000 points that link to Wikipedia, which is a good start, but we the system is open and users can add content as well. Users can create a new "blip" right from the device itself, associate it with some web content (can be an audio file, mp4 video or a web page), and share it with the rest of the world.