I am using Greenhopper, want I want to be able to set the number of stories to show on the "Task Board" to ALL. currently it only shows some of them?
From any of the Greenhopper views, in the upper right corner click on Tools then User Preferences. From the pop up dialog, click on the Task Board tab and you can set the number of Issues per Column here. You can also set the number of Issues per Page on the Planning Board tab.
To always show "ALL" issues, choose a number that is beyond anything you would actually have; I use 9999 for both Issues per Column and Issues per Page.