It's actually good sense to prevent withdraws and deposits during the first day. If something goes wrong those are the areas most prone to causing money loss, so you want to prove the system is stable in the live environment before turning that on.
Trading has been going smoothly for me so far, though traffic doesn't seem too extreme right now. We'll see what happens in the next big movement in the market.
RE: Nearly 40 Hours Later and the Kraken Exchange is Still Down - No ETA, No Need To Panic, All Right To Be Angry