I've copied and I've pasted what I found online on the Cingular wireless site.
It explains a lot and I see no hope of getting an address from a cell phone
number.   Here is the following:

"As you may have read or seen in the media, a number of websites are
advertising the availability for sale of wireless phone records. Please know
that Cingular Wireless does not sell customer information to, or otherwise
cooperate with, these companies, and we are working aggressively to combat
their practices. Cingular has filed lawsuits against several of such
companies, and has obtained restraining orders prohibiting them from
obtaining Cingular customer information or providing it to anyone.

Cingular is supporting efforts to criminalize the unauthorized acquisition or
sale of wireless phone records. We are also working with law enforcement to
address the practice that we call Cell Phone Record Ripoffs.

In addition, Cingular has a variety of safeguards in place to protect against
unauthorized access to customer information, and we continue to evaluate and
enhance these safeguards."

Does anyone know of a way to find out the owner of a cell phone if you know
their number?   I see many sites for reverse lookups for cell phones but
they charge almost 100 bucks.