Some good ham radio forums (mostly for my reference):

• http://www.hamradioforum.net/usercp.php
• http://www.worldwidedx.com/usercp.php

Other miscellaneous reference links (eventually to be classified elsewhere):

• http://en.wikipedia.org/wiki/Nato_phonetic_alphabet
• http://www.ac6v.com/homebrew.htm
• http://www.qsl.net/ossbn/