SwitcherLyrics is a new jailbreak mod in Cydia that offers the ability to view lyrics for any most tracks stored in your iPod music library.
With SwitchLyrics you can have your song's lyrics and information right in your Multitasking bar. You just have to double tap the Home button to make it work. SwitcherLyrics takes the song's lyrics from the iPod.app library. If iPod.app doesn't have any lyrics, SwitcherLyrics will search it on the web automatically.