No problem here. Link at the top of the right hand column of marriott.com home page that reads:
You're registered to earn up to 40,000 MegaBonus points. Make a stay today >>
Clicking on it takes me to the Promotion Progress page. Trust me, I have had many complaints about Marriott IT department including the inaccuracy of the city-wide search for award availability that hasn't worked since October 2007 IT downgrade. But this appears to be working fine for me.