Alfred Stepan and Juan Linz in a "review essay":http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8452384&fulltextType=RV&fileId=S1537592711003756 in
Suzanne Mettler's "piece":http://journals.cambridge.org.proxygw.wrlc.org/action/displayAbstract?aid=7874752 in Perspectives on Politics (free access to
Jeff Isaac has an "interesting response":http://chronicle.com/article/Whats-the-Value-of-Political/48811/?key=GTggJwlgYCFIY3dlKSdFfyJVO3lwIB8ranFFNnsaYVFW to the Coburn saga
I read Gary Miller and Norman Schofield's piece (abstract "here":http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=2136168&fulltextType=RA&fileId=S1537592708081218;