There are those that souped up their wifi routers and that could appear as if they are very nearby.
http://groups.google.com/group/alt.internet.wireless/browse_thread/thread/b65984102a384811/b9602b2e4c77aef0?lnk=st&q=bluetooth+bug+finder&rnum=1&hl=en#b9602b2e4c77aef0 may be interesting to read and look at the links.
Does anyone know what is needed to locate the source of a Bluetooth signal? I have a device that confirms the presence of the Bluetooth signal, but offers nothing in regards to signal strength or direction. I need to determine what/where is the source of the indicated Bluetooth signal. I'm not aware of any Bluetooth enabled devices in the office, as I've eliminated any cellphones or PDA's of employees. Thanks! - Lars