Hi all,
We've been having trouble getting into it all day, too, but I eventually found an email in my inbox with a link to the booking website:
http://www.restaurantweek.cn/lang/zh/acc/newsletter
Then they prompted you to enter the "newsletterRW" promotion code (do me a favor and also sign up for the newsletter if you want to use this code, just so we're being honest).
Then you should be able to access the reservations. Unfortunately, Maison Boulud, Whampoa Club, Hatsune and Kagen are all sold out already. I haven't looked through it all thoroughly yet, but the menus I've seen haven't been quite that exciting. Of the ones left, Capital M should be good, and Agua's lunch is pretty generous.