Today's numbers are -20 on Rasmussen. I don't think Rasmussen has updated the main page on the Daily Presidential Tracking Poll, but he has the new numbers on the "trend" page.
Rasmussen, the trend
Date 9/06/2010
Presidential Approval Index -20
Strongly Approve 26%
Strongly Disapprove 46%
Total Approve 45%
Total Disapprove 54%