Thanks @CriticalSquad for the input!
I agree that in order to gove proper advice is always best to have more information, which makes both your advices and suggestions valuable information!
1) This is very good news, since it gives me the chance to aim to complete several applications in one go (and not having to come back to people over and over for first and second round applications)
2) Some schools say that as long as you take the GMAT before the deadline, and add these schools in the list of recipients of official scores, you should be fine. Does this mean that they will consider my AWA scores once they get them? Or that they will just ignore them?
3) I've heard from friends & close ones that, for an MBA program, a more suitable recomendation would come from someone in a managerial position instead of an academic, therefore it would be best to approach people related to the business world, instead of the academic world. Is this true?
4) Would leave my application pending hurt in any way? (i.e.: "This person did not complete his application for the 1st round even though he started before the deadline, we shold be wary!").
Then again, thanks for all the help!