I get the impression that the analysts are confused. Nokia probably doesn't care if the carriers install their own apps on the N900. They won't be able to cripple the OS, however, nor will they be able to force people to pay high prices for ringtones and such.
They're maemo and MeeGo... "Meamo!" sounds like what Zorro would say to catherine zeta jones... after she slaps him for looking at her dirtily...