The recent post below from Google indicates that they just reclassified links from Blog sub-domains from external to internal. Since it takes more time and effect to do external link building, should we setup separate URL blog sites outside the main site (rather than a blog sub-domain), so that links to their main site are classified as external? http://googlewebmastercentral.blogspot.com/2011/08/reorganizing-internal-vs-external.html