Hello,

I am writing an article about the usefulness of Wikipedia outside of it's purpose as a reference and knowledge resource.

It would be very helpful to know more about the most interesting uses people have seen of 3rd parties using Wikipedia content. What projects are innovating with either the Wikipedia dumps or by accessing the content directly? Primarily I'm looking for projects who sort of extend the usefulness and the philosophy of--and perhaps contribute back to--Wikipedia since I've already see many of those that simply try to capitalize on it (with the ad content, which still is interesting, if less than scrupulous).

Is there an official collection of 3rd party activity? Does Wikimedia track/advertise 3rd parties that use the software--this is a secondary interest for me.

Thanks in advance for your thoughts,