@mrskeev- C.N.A. numbers were changed "regularly," according to the book I quoted (published in 1984) in Post#1297. They were/are intended for phone company employees only. My presumption is that 303-293-2333 was later re-asssigned to a business.
@magnum p.e.- I'm also a little overwhelmed by all the "mustard" here and on the Seattle Time's site. I'm trying to be as methodical as possible, while still thinking creatively. That said, here is a bit of speculation. I'll follow up with a post on what I think is a more important topic.
Jane Doe apparently used the screen name "Cedar" in some online forums. I don't accept that this is necessarily significant, but I will throw in a guess as to its origin. Jane Doe lived at one time in the Hub Apartment complex on Hudnall Street, in Dallas. According to Google maps, this apartment complex is bordered on three sides by Hudnall Street, Cedar Springs Road, and Cedar Plaza Drive.