Try these. I find them very useful both as a coach and as a fighter.
- A purple belt in Denmark who runs the Copenhagen Combat Academy. Regular updates. Good Posts.
- Matt Thornton's blog. Great articles. Infrequent updates. A must for BJJ coaches.
- 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.