If you are looking for some agility drills that also give your athlete some plyometric work, Coach Andrea Hurdy has a progressive series of drills that you should find helpful. Coach Hurdy is the strength and conditioning coach for the Kansas Mens Basketball Team.
In the clip below see demonstrations of four different drills (each with a couple of variations) to help develop your athletes agility. Simple yet effective progression. The drills are from a complete DVD designed to help players movement. For more information click the link Movement Efficiency: Progressions for Agility and Plyometrics
The YouTube video has sound, so please make sure that your sound is turned on and that you have access to the site.