Here is a strategy I am working on, what do you think?

I am working on a complete site redesign for a company. I have created three seperate blogs each with unique content. They are currently in the sand box but should be out soon. My goal is to have independent link building campaigns for each blog and the main company site. Then have the blogs build the keyword rich backlinks to the company site.

I have really just started this and with the blogs still in the sandbox I have yet to see any results. Are suggestions on this strategy?