Sep 10, 2012
RIP Google Adplanner
Sadly Google is withdrawing the decent part of Google Adplanner - the ability to look at the demographics of visitors to pretty much any website on the interwebs.
You can still view profile data about sites in the GDN (Google Display Network) but that is only helpful for digital media planners using GDN... not alas for the rest of us who used it for understanding the demographics and profiles of web visitors within a neighbourhood or competitor-set.
As a sort-of-replacement, try the IAB directory.