Here are some of my favorite Radio sites:

• History of the Brown Brothers keys
• The Art of Side-Swipery - History of the Cootie Key (sideswiper)
• Video - Using a sideswiper
• W1TP - Telegraph & Scientific Instrument Museum (searchable)
• Complete works of Larson E. Rapp, W1OU - noted QST author
• FOC
• A Beginners Guide to Making CW Contacts - Jack, WB8FSV
• Vizkey (keys)
• American Morse Equipment (keys)
• WØAKI (mentoring for hams and new hams)