Going to Copenhagen

It's official: I'm going to Copenhagen at the end of the month, to speak at NEXT2004 conference (which I'd mentioned before). I've never been to the European mainland-- I've spent time in England and Scotland-- so it'll be an adventure.

If anyone has suggestions about things to see, do, etc., I'm all ears. There's a very interesting new national library building that I definitely want to see, and Denmark has some tremendously important modern and postmodern architecture and design; so part of me think that I'll get a lot just by walking around.

I may also spend a day in or around Aarhus.

But other than what I've picked up from a couple travel books and my history of modern architecture classes, I know almost nothing about Copenhagen, so I'm hear recommendations about what's cool there.