Bored of seeing the same old Fonts on your iPhone / iPod? Here comes FontSwap on Cydia. This super app allows you to swap fonts used on the iPhone or the iPod. The app allows you to change System Fonts, Notes, LockClock Fonts & Dialer Fonts. Though you can’t preview fons; lets hope this will show up in future releases.
Search for “FontSwap” in Cydia
Cydia is an Installer alternative, that Installs on Jailbroken iPhone 2.x… Info here