THE_JUDGE_G4  After looking at the other sport score reporting app (Baseball, Plusmo) SportsTap is the most comprehensive and stable score reporting app I've used on my iPod Touch. Offers a bevy of sports to view scores and details about a particular game. It allows you to customize your choice of sports to report scores on and to pick favorite teams to monitor. Landscape mode is convenient, too.

The price is free, but displays Google Ads right under the menu bar. Honestly, I don't mind it and hardly notice it when using it.  
(Version 1.1.1)