"AND, I might add, that one of the loop-holes of Sarbox that didn't fix the Enron issues is that investors do not have the right to discovery."
I dont believe the section you are talking about applies to Expo Holdings.
A lawsuit could be filed and Expo would not be immune to discovery. Last I checked they do not meet or report to a public accounting oversight board, but if they did then those documents and that communication would be immune.