---- Google's Patent on Backlinks - many interesting clues from 2007
dailypress - 8:05 am on Aug 2, 2009 (gmt 0)
Frequent changes to the main menu or the title - I wouldn't touch it. I've heard enough horror stories to know that those kind of frequent changes can really bite back. And if you've got an external link in the main menu area, it better be pretty stable.
And what about the "Most Popular Links", or "Most Recent Link", or "Most Relavent Links" that many sites have under their Menu Columns? Or What about the ARCHIVES that Matt Cutts has on each page of his blog and gets updated frequently?
The reason why I ask is I have installed a "Most Popular Links" module on my site that gets updated based on the traffic each page has and since I advertise specific pages on external sites, the list of Most Popular Links changes pretty often.