What is the next big number to watch?

To me, the next big number would be ISM to be announced on October 1.  Given the contradictory number of ISM and regional surveys in the last couple of months, seasoned forecasters like David Rosenberg and Roubini.com have argued that it is highly likely that ISM will be corrected downward in the subsequent couple of months.  Let's see if they are right in the first month after their forecasts.