Re: REW blog, no content
It really wouldn't hurt you to post it to both, but really I think there are 2 types of content required. On your own site, you should be posting content that will keep people coming back to your website and building your reputation locally (Likely the majority of your website traffic is local) whereas REW Blogs (On this domain) help you establish yourself as a "web" authority, reaching a much greater audience and for more diverse subjects.
Starting LEC 7 soon but it won't be called LEC 7 - LEC 2012 coming soon!