Hi, I'm joining Marriott's program and I was wondering if anyone had a Promo code for the signup?

My company (GE) generally uses Hilton and I have a silver status over there, but it seems I have been staying in some Marriott's recently, so I might as well jump on board. I didn't see anything on the our internal travel website for a promo code, so I can just leave it blank, or is there any code that might put a few miles in the account to get me started?

I already booked a hotel stay, check in tomorrow.
Thanks.