Does anybody have some "cool clear and present" stats on how their blog over time affected their main website so and so much in SERPS. Please, by all means take a moment to brag... just give us some factual statements please..
To determine the effect of linking from one blog, seperate from all other factors you would need to do some kind of control experiment. Negative Factors 1 blog is just one site, regardless of how many links are directoed from it towards a site. Positive Factors That one site is free to host and easy to update.
a DP member has a thread that has some interesting thoughts -- http://forums.thinkbling.com/viewforum.php?f=16