lruellan - 3:52 pm on Jun 10, 2009 (gmt 0)

Thanks for your response Excellira.

I realize that the blog on a subdomain will pass some of that subdomain's Page Rank to the main site. The problem is that the subdomain will start with a zero pagerank.
And like I mentioned, we don't have the possibility of raising the PR of the subdomain by linking to it from the root domain, because we don't have much room on the root domain for editorial content where we could link to the blog.

Therefore, before the blog on a subdomain can pass any pagerank to our main site, we will have to wait first for the blog to build some pagerank of its own, which could take a while and some resources.

I would much rather have the inbound links the blog will naturally generate contribute directly to the pagerank of our main domain.
I assume I will get a much greater SEO boost for our eCommerce site with links pointing to www.oursite.com/blog/name-of-post instead of blog.oursite.com/name-of-post (even if the artcile links back to oursite.com)?