I cannot stress how much information is in this pdf format free magazine, made by members of the Harpoon simulation community. They're eagerly awaiting Harpoon 4 which has been having some delays. The mag is called
Waypoint, and is monthly except for the current issue which is bi-monthly. The current issue has more info than usual it seems, and here's a quick rundown of what it contains:
Articles on some Harpoon 3 specific things, detailed articles on the MiG-29 series, stealth methods and tactics, RC-135 variants, Oscar class submarine, articles from the Journal of Electronic Defence on the Rafale and navy ship operations, as well as current defence news and detailed information on Operation Iraqi Freedom:
http://www.harpoonhq.com/waypoint/Zephyr