Along with information on their products, many guitar makers have much more on their website which may include artist info, concerts, contests, and more. Listed below are some "extras."
Gibson - Free music, lessons, contests, forums
Martin - Famous owners, museum, factory tours, downloads
McPherson - Website features soundtrack and artist of the month
Takamine - Artist news, clinics, history
Taylor - Info on road shows, factory tours, history
Lakewood - Story, tours, musicians, social resources
Fender - News, giveaways, online lessons, tuner
Epiphone - Featured artists, news, history, products
Guild - Blog, artists, media gallery, support, history