At least you'll be able to download the full version as soon as it's available (21st of February and as Brad stated in the last journal, you'll be able to download a lot of stuff ealier so that you only have to download a few megs on releaseday.

Yep, you need Stardock Central to download.

If you still want a boxed version I think you have to mail support. But I don't think you'll have to mail your serial . Your preorder information should be enough for them. When I preordered there was no option for a boxed version either, but you should still be able to get it if you mail support. It's gonna cost you the shipping costs though. This makes it not worth it for me as the costs for shipping to Europe will be too high and I don't really care about the box too.