Could you please explain to me where to find this applet in the n900? I am not able to find it, unless you mean the My Nokia icon in the settings.
But if I click on it there are 2 options: subscribe and delete (I am translating from my language). No unsubscribe option is present.
I am afraid that clicking on delete it would erase my nokia account, while I just want that my data could not be communicated to other companies but keeping Nokia account.