Try these. I find them very useful both as a coach and as a fighter.
http://shogunhq.blogspot.com/ - A purple belt in Denmark who runs the Copenhagen Combat Academy. Regular updates. Good Posts.
http://aliveness101.blogspot.com/ - Matt Thornton's blog. Great articles. Infrequent updates. A must for BJJ coaches.
http://www.bjj-australia.blogspot.com/ - John Will's personal blog. John is Australia's first BJJ blackbelt, one of the dirty dozen, and a top level coach.
And now for a shameless plug...
I also run a blog focusing on BJJ and, to a lesser extent, S & C. It's only just starting and I'm still finding my blogger's feet so any feedback would be appreciated.
http://elementsfitness.blogspot.com/