I have this theory I was thinking of trying, but wanted to throw it out there and see if one of you already has and what your findings were. I figured if anyone could blow holes in my theory its all of you. Its often recommended to put an OBL to an authority site like Wikipedia. Or mix in OBL's to such sites. Here's what I'm wondering. Does the G take into account the promixity and frequency of proximity to "classes" of links and use that to classify your site siimlarly? In other words, does the G algorithm consider "you are who you hang out with". If you build lots of backlinks but always mix them in proximity to links to .edu, .gov and PR10 sites, will the G then start to consider your site to be "just like them"? If you do this across your pyramid etc. can you make the big G think that most people consider your site to be like those sites and then treat it accordingly? Or does this not work?