Welcome to the world of FF bodies with no flash or transmitter.
Once you move to FF, you will need a trigger as Neuro said, and the focal length of all your lenses will appear to have shrunk by a factor of 1.6.
Then, you should consider using CF memory rather than your SD (It will work, just not the best, particularly not for video)
There will be a noticible advantage at very high ISO settings, mucho better autofocus, and AFMA to let you fine tune your lenses. So set some money aside for FoCal.
Don't forget a spare battery