Official Yo-Yo Message Board of www.YoYoGuy.Com
By far the most frequented message board of any.

Official Yo-Yo Message Board of MasterMagic.NET.
Great place to ask questions about the site or regarding tricks.

Official Yo-Yo Message Board of TheYoStore.com.
Very frequented and well kept.

SkillToys.com Forum

Official Yo-Yo Message Board of SkillToys.com
Very frequented and well kept.
Also home of John Higby's official message board.

Official Yo-Yo Message Board of YoYoNation.com
Very frequented and well kept.

ExtremeSpin Forum

Official Yo-Yo Message Board of ExtremeSpin.com
Very frequented and well kept.

Official Yo-Yo Messageboard of Yomania.com

Official Yo-Yo Messageboard of YoYoz.co.uk.
By far most frequented Message Board for UK yo-yo players.

Team A2Z Forum

Official Yo-Yo Messageboard of Team A2Z.
Helps keep A2Z players up to date with meet times and more.

Official Yo-Yo Messageboard of Duncan Yo-Yos.
Great place to ask questions regarding Duncan Products.

Official Yo-Yo Messageboard of Buzz On Industries.
Great place to ask questions regarding Buzz On Yo-Yos.

Official Messageboard of the American Yo-Yo Association.
Great place to ask about competitions and World Records.