Towerheads- THE Hunter Jumper site to visit.  'Nuff said.

Big Eq- "The 'A' Circiut online for juniors and young riders."  This is a super site with wonderful information.

Catch Ride- A fun site with great interviews, info and pictures.

Ryegate- Tons of results and stories.

Saddletude- A great site for riders of all disciplines.  Videos, stories, pictures, interviews and more! 

The Chronicle of the Horse- Another site for all disciplines.  Awesome message boards, great stories and rider standings.