Other than the first part (the one about me not approving of Nokia sniffing my phone number), here's the problem I have with my personal number being my username:

There's a reason credit card numbers are NEVER to be stored in plain text. No matter how secure you make your web interface, there's always a risk of someone hacking into your database (sometimes even from within).

Now imagine someone hacking the My Nokia database, where millions of phone numbers (and who knows what else - for all we know Nokia might have a database of our contacts, locations, URL history and what not by now) are stored IN PLAIN TEXT.

I'm not much of a privacy guru normally, but this is even crossing my line by now. That "contract" we "signed" by installing 1.2 would give them (and any of their "partners") the freedom to do whatever they want with any information they get by whatever means they see fit. Though I'm pretty sure this is contra bonos mores on EU territory.