Usability 
Juha K. Siltala's blog covering Linux and Ubuntu. Content includes news, software and UX reviews. Juha (@topyli) is a member of the Ubuntu project and chairman of The Finish Linux User group. He describes himself as "...a Free Software enthusiast an electronic civil rights fist-shaker, an armchair tree-hugger, a geek, and a pretty good drummer. I’m a great drinking buddy but not much of a craftsman."