Brent Kim, a weightlifting friend of mine, is nearing completion of a linear progression program (Mark Rippetoe helped develop it for him) and his results are great.
Magic Man Workout #13
Keep in mind that Brent is an intermediate level weightlifter with a good training history. This isn't a fat boy to fabulous program. Just goes to show you that the simplicity of an organized program performed well will bring positive results for extended periods. His early squat sessions were 335 (3sx5r) low-bar back squat and his most recent squat workout was 385 (3sx5r)... on a linear progression program (basically adding 5 pounds to the bar every workout).
For volleyball players, I prefer to change/vary the speed/power stimulus regularly but favor a more linear style with strength work (depending on the time of year).
If you would like to read more on Brent's training check it out here: