When I first tried the Active Directory web service I had no idea what data would be returned. It is critical to know the "Keys" to filter on as described in the How-To posts. Here is the list of the most interesting keys that our intenral ActiveDirectory returns, but your list may be different. The best way to find out what you have to work with is to create the connections, display them as a repeating table, preview and see what you get. For our system the list of keys was the same for both the GetMyInfo and GetUserInfo methods.
Sample list from our internal system:
Shiraz Cupala / Microsoft InfoPath MVPQdabra® Software / Streamline data gathering to turn process into knowledge