Some issues have been reported in IE8 and IE9 but otherwise things are moving nicely. Most of you will not notice any changes even after we are done until you are trained on the new features. If you don't send broadcast emails or do marketing for your store you will never notice any changes.
No formal announcement regarding this update will be blog'd or released. Should you want more information or to be trained on the changes please contact support. Again, regular users this is nothing new. This update is for marketing and broadcast emailers. We think we will be done and clear of bugs by Monday or Tuesday. Another update will come around noon EST.
Best,
Keith