This is an experience I reckon and the 5 year jubilee 2005.
I haven't run it before but have put in my entry for 2005.
Apart from getting up on to the bridge, it should be flat, i think. South of Sweden is VERY flat.
More info on www.broloppet.com
I have been on the bridge in a car and train and the views are stunning! Have a look at the pictures on the web site.
It's possible to get quite cheap flights at least with SAS. I fly from Manchester to Copenhagen for about £85.
The other closest airport is Sturup in Malmoe.