Hilary Putnam is writing on Tarski’s theory of truth (and Field’s analysis of it) at Sardonic Comment. First two blog posts are up:

http://putnamphil.blogspot.ca/2014/09/first-of-series-of-posts-on-tarski-i-am.html

http://putnamphil.blogspot.ca/2014/09/a-second-post-on-tarski-this-post.html