Yep. I am at least. An no, no notification for me. I restarted Impulse and when I tried updating (like I had done about a half dozen times already this morning), this time instead of saying that my key was invalid and would I like to update or change my registration info, it instead told me that I couldn't update the installed version. I had to uninstall Demigod and download it all over again.
I wonder if Stardock has a hosting partner, because this is going to put a tremendous strain on their Internet connection... Demigod is nearly 2GB. That is a lot of data for so many people to be downloading all at once.
But for now, my download speed seems capped right about at my service level from my ISP - so, so far so good! I just passed 20% download and I started it just about the same time I started this thread.