I don't see any CD in the box the N900 came in...

On the Nokia site when I select N900 it gives me the regular 7.1.40.1 version, which is what I'm using. I also tried the previous one, 7.1.30.9, which works just fine on my other PC at work.

At least it works as an USB modem, PC Suite found it and installed the driver, dial-up works fine... and the laptop keeps the N900's battery from emptying too fast :-)