This probably belongs over in TravelBuzz or some other forum, but... on very short notice (I was getting on the plane from ORD as I made the reservation) I stayed at the Rossini and was sufficiently pleased at what I got for $100. It was a typical 3* Scandinavian hotel, which in the USA would be a 1.5 star. But, it's clean, it's in a suburban area but only about twelve minutes door-to-door to the Central Station and the TI via the subway, and the staff is friendly.
In Sweden, I've had some success with the Supranational and Sweden Hotels chains.
OK,
essxjay, you can move the thread now.