OK, call me a tease.....
I simply reviewed the info from the 2004 promo, and saw that you could register by calling 1-888-MARRIOTT
So, I called that number tonight and the recording said I had reached the Marriott MegaBonus enrollment line. I entered my Marriott Rewards number when prompted, and was registered and given the conditions I outlined in the previous post.
The dates given are new and the parameters I received are different than those I received in 2004.
(And apologies in advance to Chris if I overstepped Marriott Corporate bounds.)