Thankfully it was super easy to change. :)
If you find yourself in the same boat, here's how you can revert your screen back to white.
Go into your Illustrator preferences (found at the top left hand corner of your screen) and then "user interface".
I changed my brightness to light at 100% and then change my canvas color to white.
I haven't had too much time to really play around with this yet, but I do have to say that I am loving it so far. It seems to run even faster than CS5 and faster is always a bonus for me. I tend to have a lot of files open at once which can sometimes bog the program down.
Has anyone else downloaded this yet and if so, what do you think?