Who are the "medium to large" Information Technology Wide Area
Netowrk (WAN) "Integrators" in the following cities; Raliegh, NC,
Charlotte, NC, Nashville, TN, Atlanta GA, Tampa, FL and Miami/Ft.
Lauderdale, FL? I would like to have their company name, web site and
contact phone #'s.

Hi:
From my experience, you will not find lists of IT integrators online
as IT Systems Integration has at least twenty five specializations if
not more. For example, there is a group specializing only in Voice and
Telephony Integrators. These lists are available from Direct Marketing
companies such as InfoUSA - but again my experience has shown that the
data is usually outdated or you will get names of companies not
directly related.
My suggestion to you is as follows:
1. Do a Google search on IT System Integrators (with the specific IT
specialization you are looking for) specifying state and city that you
are searching for.
2. Scan through the data provided - and usually, you do find short
lists of target companies that you are looking for.
3. Research these companies online and you will get most of the
contact information that you are looking for.

Here is one place that you can start:
http://www.webstart.com/cc/

Good Luck ...and let me know if you need any more info. 

PS: I manage a team in India that is helping me to research
specialized IT companies in the US. IF you have specific data that you
need to research, do send me an email : zeelog@hotmail.com