Insane Page of Yo
Yolinka's and YoAce's site, includes mods, tips, links, and yo-yo reviews.
Professor Yo-Yo
Stuart Crump with some tricks, links, jokes, quotes, and information on his published books.
Shade's String World
Yo-Yo videos, reviews, tricks, and links featured.
Yo-Yo Central
Some tricks, tips, videos, reviews, and a list of yo-yo companies.