But I have uploaded data to the site.

A beta version of CensusPlus was uploaded a while back.. it seems to work ok but there are some user interface items I am not happy with so I have not marked it as a release yet.
This version triggers a who query after two requirements are met.
First a hardware trigger is fired in the client.
Second at least 5 seconds have past since the last query has been completely processed.
There are a number of ways that the hardware trigger is issued, the primary used in this add on is mouse button down events.
There are two variants of this event, one where your mouse pointer is over the world frame, and the other when it is over a UI action feature (i.e. a button item on screen).
The later does not always work due to Blizzard not attaching the right code to all UI items.
(example Horde hunter at Razer hill in Durotar, click on another classes trainer then closing the window with the X button or the GOODBYE button is a hardware trigger, clicking the close button on the general goods dealer is a hardware tigger, but clicking the close button on the bandage trainer is NOT a hardware trigger)