Yesterday I posted that the survey appears to be gone, but infact they changed the set up. You now have to click on the "Take a survey get 20 msp" picture like the picture I used above. Then it will take you to the survey. This is a change from previous months with the survey built right into the front page.
If you signed up for Xbox rewards, today you get 20 msp for completing the survey.
Click Here for the Survey
If you havn't signed up yet,
Click Here and sign in with your Windows Live I.D. (same info you used for your Xbox 360 Live account)