This is a very good resource on Spread Spectrum technology.
http://www.sss-mag.com/hamss.html

Wireless technologies.
http://news.wirelessdesignonline.com/

A great site to take practice exams. They generated random question exams based on the VEC question pools.
http://www.wvara.org/

Downeast Microwave, a great source of microwave components.
http://downeastmicrowave.com/