I left for work an hour ago and I had 98% of the patch D/Led and the launcher had updated to 4.0; so if you want your wow ready to rock at 10pm when it finally becomes stable, you can start'er up now and install all of 4.0.1. I've already finished d/ling 4.0 now but the install itself only went about 30% over a 45 minute period (breakfast + shower etc).