R.P.M the Yo-Yo Center
Includes message board, chat room, directory of clubs organized by location, and a directory of links.

How Do Yo-Yos Work?
Science behind makes it go up and down.

Spin Central
Clubs, events and news from the Twin Cities areas and the Mid-West.

X-Project
Freestyle, clip and trick videos.

YoYoCraft
An extensive guide to ways to add fun to yoing by decorating your yo-yos and string.