OK. Don't be rediculous here. Cingular is a very, very popular service provider (it's the most popular one total in the US), and being unable to log in to their web site (which I could never do reliably in Tiger) is surely a major annoyance. I'm sure that anybody with Report Bug in their toolbar has been clicking it furiously when it doesn't work and they have to switch to Firefox.
In fact I dare say that this was my biggest site-doesn't-work annoyance with Safari in total. So it's no surprise that it's singled out in their release notes, and it was a really nice way of letting people know that this works now.
iTunes phone rumors are just insane speculation at this point. Most of the people around here probably believe that they'll be buying a 60GB iPod phone in the size of an iPod Shuffle and sex appeal of the RAZR or SLVR (have you seen one yet? they're hot hot hot) in a few months, based on what I've read here and on Engadget.
Speculation about Apple fixing a login issue on the account management site of the #1 US cellular provider because of a phone relationship is just silly. Whether the relationship exists or not Apple would have fixed the issue anyway and let people know about it.