Yo-Yos

Dave's Wonderful World of Yo-Yos
Includes message board, auctions, images by Ron Caswell, museum of collectibles, memorabilia, and patents [PDF], history, image downloads, and links.
http://www.nmia.com/~whistler/

Extreme Yo
Provides instructional videos of tricks, brief history, and a message board.
http://freakonamac.tripod.com/home.html

National Yo-Yo Museum
Features displays, photographs, events, history, and contests. Directions and hours included. Located in Chico, California.
http://www.nationalyoyo.org/

The Next Level
Includes videos of tricks, maintenance tips, mods, and links.
http://www.yoyoing.com/tnl/

R.P.M the Yo-Yo Center
Includes message board, chat room, directory of clubs organized by location, and a directory of links.
http://www.yoyoing.com/

Yomania.com
A selection of tricks, reviews, and tips with a message board.
http://www.yomania.com/

The Yo-Yo Tweak
Tricks and mods explained through POV images, maintenance tips, reviews, and links.
http://olympia.fortunecity.com/shaq/65/yoyotweak.html

YoYoinfo
Includes a glossary, FAQs, and Who's Who. Also features world and national champions information.
http://memweb.newsguy.com/~jparrish/slowyosites/