As mentioned here, I was chosen to take part in a Beta Exam for Microsoft. Well, it turns out that they decided to make a second version of the test and re-invited everyone to take it.
The 70-621 Exam this time around was completely different (I think only 2 or 3 questions resembled the ones from the first go around). I won’t have my results for another month or two, but I think I passed. 
I’ll make a new post when I get my answer… keep your fingers crossed!