Once you are pronounced man and wife in Aruba, you are legally married regardless of your location. You will need the marriage certificate to legally change some documents, but you are considered married. You might check with your local/state records office, but in Ohio, I was told nothing further was required state-side.
Not wanting to bring up a sore subject, but since the records reside in Aruba, I assume in the event of a divorce, it must also be done via Aruba courts?? Obviously I'm not planning this as I am a newlywed, but someone asked me this question (rude, I know!).
I'm sure others can chime in, as I'm one of the ones still waiting on my translated certificate from Aruba.
Lori