I took a several hundred shots (good thing about digital) at a Michigan girls high school basketball game recently. Lighting continues to be the biggest challenge that any photographer faces when shooting indoor sports....especially a fast sport like basketball. Fast shutter speed is a must for me since I strive to eliminate the blur factor. But fast shutter speed requires higher ISO (usually around 1000 or higher which produces more noise in the pictures) and an aperture value of f2.0 or better (expensive lens). The resulting shutter speed should be 1/500 or better to ensure a clear photograph.
These shots were taken with a Canon Mark II, ISO1250, shutter speed 1/640 and aperture f1.8.