I signed up for a two year plan for mobile 3G internet from Telenor, which also happens to be my current cellular carrier. Their current offer is really good, SEK 200 a month, fixed price.
However, the link they provide to download drivers for Mac points to an old version which does not install on my machine. To get the latest and greatest. go to Option: wireless technology
Update: Never mind. Globetrotter Connect is truly useless. I gave up and purchased Launch2Net, very expensive but it just works.