The GISDoctor.com geo-blogs page has been updated. I added a couple more links and updated some content. If there is a geo-blog I am missing (and I am sure there are a few), please leave a comment and I will try to add it to the list as soon as I can!
Also, I created an OPML file for readers – GIS Doctor blog roll OPML file – current to 1/20/2013
Knowledge is power!