It’s amazing how much the Central Ohio Bed Bug Task Force has been able to accomplish without any significant funding. The latest example is this presentation from the recent Central Ohio Bed Bug Summit: Bed Bug Distribution through Greater Columbus, 2007 – 2009 (PowerPoint).
The task force presents data from calls received at Columbus Code Enforcement, the Franklin County Board of Health and also from a survey of pest management firms in the Columbus area (3 firms responded):

Bed bug distribution in Columbus, 2009 - source: COBBTF
The bottom line:
No part of the metro area is bed bug free
And, not surprisingly:
Bed bug calls are straining the resources of CCE [Columbus Code Enforcement], FCBH [Franklin County Board of Health], and most social services agencies in our city
This type of data collection is essential and here it is properly contextualized. Very often bed bug statistics are misunderstood. Valuable indicators, but by no means the extent of the problem.
These pages may be of related interest: