Great pinball blogs are tough to find. It's a lot of work to maintain a blog, let alone have the knowledge and time to thoroughly research a topic and score interviews with people in the industry. Credit Dot refers to itself as "mapping trends for the casual enthusiast" and despite only being around since April of 2014, is a treasure trove of information. Featuring discussions about people in the industry, mods, interviews, and tackling controversial topics, Credit Dot is a superb read. My favorite posts are:
Clay Harrell (The Pinball Ninja)
Creature From the Black Lagoon Lighted Speaker Panel
Pinball Circus To Be Produced
I highly recommend checking out Credit Dot, and have added a link in the sidebar...