Looking for a new phone, but have to provide SSN to Cingular?

I was thinking it might be time to move to a new mobile phone, so I went over to Cingular's site to see what phones they're currently carrying. I clicked through the process saying I wanted to upgrade a device on an existing service plan as a former AT&T Wireless customer, and then it asked for my mobile number and the last four digits of my Social Security Number!

All I wanted was to see the list of current phones and features - whassup with having to provide personal data to see the catalog? A perfect example of bad marketing at work.

Of course what I really want is the not yet available Nokia E61 - wow, looks like a phone that does it all. That probably means the US carriers won't have it.