This morning I got the same message from Lyte, and my first thought is "Why wouldn't he just stick to putting the link on the forums?" Also, anytime I hear "Hurry, they're going fast!" I become suspect of why someone's pushing me to move.
I loaded the site onto my netbook and looked; there's a cheesy, tiled Xbox 360 logo, a nonstandard MS Live login box, and NO TEXT or anything explaining about what kind of promotion is giving away teh free moneyz. The whole page is on regular http protocol (not https) but even xbox.com does that by default.
Anyway, unless you see a full-on MS live verification of some kind, there's no way you should ever be putting your username/pwd in ANYWHERE other than an official MS site. I cannot fucking believe ANYONE fell for this.