Yes, that URL does display all open incidents and I can also create querys inside of altiris as well. However, maybe I want to display that data on a dashboard with charts without having to create new excel documents everyday or integrate helpdesk with another tool....

So I was able to find the needed info in the "Integrating with Altiris Helpdesk" file. The guide points you more in the direction of using VB.net, but it does include the different field names for workitem_detail_view and workitem_current_view which I found very helpful.

I created a deshboard using Adobe flex to gather data on tickets using the ExecuteQuery operation on the webservice. All I had to do was pass a SQL query and 0 for the max rows. Here is an example of a query that I passed to gather a count of all open tickets owned by a certain worker and more than 30 days old.

SELECT COUNT(*) from workitem_current_view WHERE owned_by_worker_name = 'IS RUN' AND workitem_created_on <= DATEADD(day,-30,CURRENT_TIMESTAMP) AND workitem_status_lookup_id <> 600