Magazines and E-zines

Active Hardware Motherboard Reviews
Archive of motherboard reviews.
http://active-hardware.com/english/reviews/mainboard/mainboard.htm

AnandTech Motherboard Section
News, articles and reviews, including thorough analyses of selected boards.
http://www.anandtech.com/mb/

Daily News Computer Motherboards Specification
A weblog detailing motherboard specifications.
http://mobospecs.blogspot.com/

EPIA Center
News on the Mini-ITX form factor and other small computer systems. Reviews, projects, advice, a forum and a power consumption simulator.
http://www.epiacenter.com/

Mini-ITX News
Independent Mini-ITX, small form factor and embedded news
http://mini-itx-news.blogspot.com/

mini-itx.com
Independent Mini-ITX form factor news, suggestions, links and complete plans for projects, hardware suppliers, FAQ and online store.
http://www.mini-itx.com/

Motherboards.org
Reviews, recommendations and buying secrets. Information and advice on chipsets, manufacturers and vendors.
http://www.motherboards.org/

Tom's Hardware Guide
Motherboard information, reviews and performance testing with overclocking discussions and overall stability reports.
http://www.tomshardware.com/motherboard/index.html