This is a Collada export plugin. Similar to the one using FBX, it is meant mostly for Game Engines (well, not like Collada is useful for anything else anyway). It's pretty complete in features, it supports:
-Animations (including exporting all actions)
-Several export options.
-Source is really simple, complete and very compact, only 1200 lines of code.
-Seems to work well with most game engines
-Can be a nice alternative to the HUGE OpenCollada-based exporter, and easier to understand and contribute to.
-I don't know enough about the Blender internal API so I'm sure that many things are not done properly. As a result, can crash with some combinations of data, and not sure if the way it exports is optimal performance-wise (although it seems kind of fast).
-Can't figure out why state is not saved with the scene, or reloaded properly (due to the point above).
-The author can fix bugs regarding to how the format is exported, to make it as correct as possible, but does not have enough time to understand Blender internals and API to use it properly (due to the two points above)
-The author needs help from a more experienced blender developer (due to the three points above).
Please re-assign this task to whoever is fit!