So when I go to system updates, it shows Update 2.1 downloading...but hasn't made any progress since I received the notification email at 8 pm yesterday.
When mine came through, it said "Downloading..." while showing no download progress at all for nearly 90 minutes. I tried powering off and doing a battery pull, but it still said it. I gave up and was going to do it manually later that day, but I tried the system update again a few hours later. It had "reset" and let me choose "Download." My guess is that it timed out or something. On the second download attempt it went fine. Hope this helps.